Soft Drink
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Soft Drink

A glass of cola served with ice cubes
Soft drink vending machine in Japan

A soft drink (see § Terminology for other names) is a drink that usually contains carbonated water (although some vitamin waters and lemonades are not carbonated), a sweetener, and a natural or artificial flavoring. The sweetener may be a sugar, high-fructose corn syrup, fruit juice, a sugar substitute (in the case of diet drinks), or some combination of these. Soft drinks may also contain caffeine, colorings, preservatives, and/or other ingredients.

Soft drinks are called "soft" in contrast with "hard" alcoholic drinks. Small amounts of alcohol may be present in a soft drink, but the alcohol content must be less than 0.5% of the total volume of the drink in many countries and localities[1][2] if the drink is to be considered non-alcoholic.[3]Fruit punch, tea (even kombucha), and other such non-alcoholic drinks are technically soft drinks by this definition, but are not generally referred to as such. Unsweetened sparkling water may be consumed as an alternative to soft drinks.

Soft drinks may be served chilled, over ice cubes, or at room temperature. They are available in many container formats, including cans, glass bottles, and plastic bottles. Containers come in a variety of sizes, ranging from small bottles to large multi-liter containers. Soft drinks are widely available at fast food restaurants, movie theaters, convenience stores, casual-dining restaurants, dedicated soda stores, vending machines, and bars from soda fountain machines. Soft drinks are usually served in paper or plastic disposable cups in the first three venues. In casual dining restaurants and bars, soft drinks are often served in glasses made from glass or plastic. Soft drinks may be drunk with straws or sipped directly from the cups.

Soft drinks are mixed with other ingredients in several contexts. In Western countries, in bars and other places where alcohol is served (e.g. airplanes, restaurants and nightclubs), many mixed drinks are made by blending a soft drink with hard liquor and serving the drink over ice. One well-known example is the rum and coke, which may also contain lime juice. Some homemade fruit punch recipes, which may or may not contain alcohol, contain a mixture of various fruit juices and a soft drink (e.g. ginger ale). At ice cream parlors and 1950s-themed diners, ice cream floats, and specifically root beer floats, are often sold. Examples of brands include Coca-Cola, Pepsi, Sprite, Sierra Mist, Fanta, Sunkist, Mountain Dew, Dr Pepper, Crush and 7 UP.

Terminology

While the term "soft drink" is commonly used in product labeling and on restaurant menus, in many countries these drinks are more commonly referred to by regional names, including carbonated drink, cool drink, cold drink, fizzy drink, fizzy juice, lolly water, pop, seltzer, soda, coke, soda pop, tonic, and mineral.[4][5] Due to the high sugar content in typical soft drinks, they may also be called sugary drinks.

In the United States, the 2003 Harvard Dialect Survey tracked the usage of the nine most common names. Over half of the survey respondents preferred the term "soda", which was dominant in the Northeastern United States, California, and the areas surrounding Milwaukee and St. Louis. The term "pop", which was preferred by 25% of the respondents, was most popular in the Midwest and Pacific Northwest, while the genericized trademark "coke", used by 12% of the respondents, was most popular in the Southern United States.[4] The term "tonic" is distinctive to eastern Massachusetts, although usage is declining.[6]

In the English-speaking parts of Canada, the term "pop" is prevalent, but "soft drink" is the most common English term used in Montreal.[7]

In the United Kingdom and Ireland, the term "fizzy drink" is common. "Pop" and "fizzy pop" are used in Northern England, South Wales, and the Midlands, while[8] "mineral"[5] or "lemonade" (as a general term) are used in Ireland. In Scotland, "fizzy juice" or even simply "juice" is colloquially encountered. In Australia and New Zealand, "fizzy drink" or "soft drink" is typically used.[9] In South African English, "cool drink" and "cold drink" are used,[10] but in South African Indian English, "cool drink" is most prevalent. Older people often use the term "mineral".

In other languages, various names are used: descriptive names as "non-alcoholic beverages", equivalents of "soda water", or generalized prototypical names. For example, the Bohemian variant of the Czech language (but not Moravian dialects) uses "limonáda" for all such beverages, not only for those from lemons. Similarly, the Slovak language uses "malinovka" (= "raspberry water") for all such beverages, not only for raspberry ones.

History

The origins of soft drinks lie in the development of fruit-flavored drinks. In the medieval Middle East, a variety of fruit-flavored soft drinks were widely drunk, such as sharbat, and were often sweetened with ingredients such as sugar, syrup and honey. Other common ingredients included lemon, apple, pomegranate, tamarind, jujube, sumac, musk, mint and ice. Middle Eastern drinks later became popular in medieval Europe, where the word "syrup" was derived from Arabic.[11] In Tudor England, 'water imperial' was widely drunk; it was a sweetened drink with lemon flavor and containing cream of tartar. 'Manays Cryste' was a sweetened cordial flavored with rosewater, violets or cinnamon.[12]

Another early type of soft drink was lemonade, made of water and lemon juice sweetened with honey, but without carbonated water. The Compagnie des Limonadiers of Paris was granted a monopoly for the sale of lemonade soft drinks in 1676. Vendors carried tanks of lemonade on their backs and dispensed cups of the soft drink to Parisians.[13]

Carbonated drinks

Bubbles of carbon dioxide float to the surface of a carbonated soft drink.

Carbonated drinks or fizzy drinks are beverages that contain dissolved carbon dioxide. The dissolution of CO2 in a liquid, gives rise to fizz or effervescence. The process usually involves carbon dioxide under high pressure. When the pressure is removed, the carbon dioxide is released from the solution as small bubbles, which causes the solution to become effervescent, or fizzy. A common example is the dissolving of carbon dioxide in water, resulting in carbonated water. Carbon dioxide is only weakly soluble in water, therefore it separates into a gas when the pressure is released.

Carbonated beverages are prepared by mixing flavored syrup with carbonated water, both chilled. Carbonation levels range up to 5 volumes of CO2 per liquid volume. Ginger ale, colas, and related drinks are carbonated with 3.5 volumes. Other drinks, often fruity ones, are carbonated less.[14]

Engraving of assorted scientific equipment, such as a pneumatic trough. A dead mouse rests under one glass canister.
Equipment used by Joseph Priestley in his experiments on gases and the carbonation of water

In the late 18th century, scientists made important progress in replicating naturally carbonated mineral waters. In 1767, Englishman Joseph Priestley first discovered a method of infusing water with carbon dioxide to make carbonated water[15] when he suspended a bowl of distilled water above a beer vat at a local brewery in Leeds, England. His invention of carbonated water (also known as soda water) is the major and defining component of most soft drinks.[16]

Priestley found that water treated in this manner had a pleasant taste, and he offered it to his friends as a refreshing drink. In 1772, Priestley published a paper entitled Impregnating Water with Fixed Air in which he describes dripping oil of vitriol (or sulfuric acid as it is now called) onto chalk to produce carbon dioxide gas, and encouraging the gas to dissolve into an agitated bowl of water.[16]

Another Englishman, John Mervin Nooth, improved Priestley's design and sold his apparatus for commercial use in pharmacies. Swedish chemist Torbern Bergman invented a generating apparatus that made carbonated water from chalk by the use of sulfuric acid. Bergman's apparatus allowed imitation mineral water to be produced in large amounts. Swedish chemist Jöns Jacob Berzelius started to add flavors (spices, juices, and wine) to carbonated water in the late eighteenth century.

Thomas Henry, an apothecary from Manchester, was the first to sell artificial mineral water to the general public for medicinal purposes, beginning in the 1770s. His recipe for 'Bewley's Mephitic Julep' consisted of 3 drachms of fossil alkali to a quart of water, and the manufacture had to 'throw in streams of fixed air until all the alkaline taste is destroyed'.[12]

Johann Jacob Schweppe developed a similar process to manufacture carbonated mineral water at the same time. He founded the Schweppes Company in Geneva in 1783 to sell carbonated water,[17] and relocated his business to London in 1792. His drink soon gained in popularity; among his new found patrons was Erasmus Darwin. In 1843, Schweppes commercialized Malvern Water at the Holywell Spring in the Malvern Hills, and received a royal warrant from King William IV.[18]

It was not long before flavoring was combined with carbonated water. The earliest reference to carbonated ginger beer is in a Practical Treatise on Brewing. published in 1809. The drinking of either natural or artificial mineral water was considered at the time to be a healthy practice, and was promoted by advocates of temperance. Pharmacists selling mineral waters began to add herbs and chemicals to unflavored mineral water. They used birch bark (see birch beer), dandelion, sarsaparilla, fruit extracts, and other substances. Flavorings were also added to improve the taste.

Mass market and industrialization

An 1883 advertisement for Schweppes Mineral-Waters

Soft drinks soon outgrew their origins in the medical world and became a widely consumed product, available cheaply for the masses. By the 1840s, there were more than fifty soft drink manufacturers - an increase from just ten in the previous decade. Carbonated lemonade was widely available in British refreshment stalls in 1833,[19] and in 1845, R. White's Lemonade went on sale in the UK.[20] For the Great Exhibition of 1851 in London, Schweppes was designated the official drink supplier and sold over a million bottles of lemonade, ginger beer, Seltzer water and soda-water. There was a Schweppes soda water fountain, situated directly at the entrance to the exhibition.[12]

Mixer drinks became popular in the second half of the century. Tonic water was originally quinine added to water as a prophylactic against malaria and was consumed by British officials stationed in the tropical areas of South Asia and Africa. As the quinine powder was so bitter people began mixing the powder with soda and sugar, and a basic tonic water was created. The first commercial tonic water was produced in 1858.[21] The mixed drink gin and tonic also originated in British colonial India, when the British population would mix their medicinal quinine tonic with gin.[12]

The Codd-neck bottle provided an effective seal for soft drinks in the late 19th century

A persistent problem in the soft drinks industry was the lack of an effective sealing of the bottles. Carbonated drink bottles are under great pressure from the gas, so inventors tried to find the best way to prevent the carbon dioxide or bubbles from escaping. The bottles could also explode if the pressure was too great. Hiram Codd devised a patented bottling machine while working at a small mineral water works in the Caledonian Road, Islington, in London in 1870. His Codd-neck bottle was designed to enclose a marble and a rubber washer in the neck. The bottles were filled upside down, and pressure of the gas in the bottle forced the marble against the washer, sealing in the carbonation. The bottle was pinched into a special shape to provide a chamber into which the marble was pushed to open the bottle. This prevented the marble from blocking the neck as the drink was poured.[12]

By mid-1873 he had granted 20 licenses and received a further 50 applications. This was boosted further by a Trade Show held in London in the same year. By 1874 the license was free to bottle manufacturers as long as they purchased the marbles, sealing rings and used his groove tool, and the mineral water firms they traded with had already bought a license to use his bottle.

In 1892, the "Crown Cork Bottle Seal" was patented by William Painter, a Baltimore, Maryland machine shop operator. It was the first bottle top to successfully keep the bubbles in the bottle. In 1899, the first patent was issued for a glass-blowing machine for the automatic production of glass bottles. Earlier glass bottles had all been hand-blown. Four years later, the new bottle-blowing machine was in operation. It was first operated by the inventor, Michael Owens, an employee of Libby Glass Company. Within a few years, glass bottle production increased from 1,400 bottles a day to about 58,000 bottles a day.

In America, soda fountains were initially more popular, and many Americans would frequent the soda fountain daily. Beginning in 1806, Yale University chemistry professor Benjamin Silliman sold soda waters in New Haven, Connecticut. He used a Nooth apparatus to produce his waters. Businessmen in Philadelphia and New York City also began selling soda water in the early 19th century. In the 1830s, John Matthews of New York City and John Lippincott of Philadelphia began manufacturing soda fountains. Both men were successful and built large factories for fabricating fountains. Due to problems in the U.S. glass industry, bottled drinks remained a small portion of the market throughout much of the 19th century. (However, they were known in England. In The Tenant of Wildfell Hall, published in 1848, the caddish Huntingdon, recovering from months of debauchery, wakes at noon and gulps a bottle of soda-water.[22])

New York in 1890. A street sign "SODA" is visible at the bottom left part of the image

In the early 20th century, sales of bottled soda increased exponentially, and in the second half of the 20th century, canned soft drinks became an important share of the market.

During the 1920s, "Home-Paks" were invented. "Home-Paks" are the familiar six-pack cartons made from cardboard. Vending machines also began to appear in the 1920s. Since then, soft drink vending machines have become increasingly popular. Both hot and cold drinks are sold in these self-service machines throughout the world.

Consumption

Per capita consumption of soda varies considerably around the world. As of 2014, the top consuming countries per capita were Argentina, the United States, Chile, and Mexico. Developed countries in Europe and elsewhere in the Americas had considerably lower consumption. Annual average consumption in the United States, at 153.5 liters, was about twice that in the United Kingdom (77.7) or Canada (85.3). From 2009 to 2014 consumption dropped over 4% per year in Greece, Romania, Portugal, and Croatia (putting these countries at between 34.7 and 51.0 liters per year). Over the same period, consumption grew over 20% per year in three countries, resulting in per-capita consumption of 19.1 liters in Cameroon, 43.9 liters in Georgia, and 10.0 liters in Vietnam.[23]

Production

A large green jug
A jug of bottler's flavor for 7-Up. The syrup-like concentrate lacks sugar and is sold to franchisees to refill.

Soft drinks are made by mixing dry or fresh ingredients with water. Production of soft drinks can be done at factories or at home. Soft drinks can be made at home by mixing a syrup or dry ingredients with carbonated water, or by lacto-fermentation. Syrups are commercially sold by companies such as Soda-Club; dry ingredients are often sold in pouches, in a style of the popular U.S. drink mix Kool-Aid. Carbonated water is made using a soda siphon or a home carbonation system or by dropping dry ice into water. Food-grade carbon dioxide, used for carbonating drinks, often comes from ammonia plants.[24]

Drinks like ginger ale and root beer are often brewed using yeast to cause carbonation.

Of most importance is that the ingredient meets the agreed specification on all major parameters. This is not only the functional parameter (in other words, the level of the major constituent), but the level of impurities, the microbiological status, and physical parameters such as color, particle size, etc.[25]

Some soft drinks contain measurable amounts of alcohol. In some older preparations, this resulted from natural fermentation used to build the carbonation. In the United States, soft drinks (as well as other products such as non-alcoholic beer) are allowed by law to contain up to 0.5% alcohol by volume. Modern drinks introduce carbon dioxide for carbonation, but there is some speculation that alcohol might result from fermentation of sugars in a non-sterile environment. A small amount of alcohol is introduced in some soft drinks where alcohol is used in the preparation of the flavoring extracts such as vanilla extract.[26]

Producers

In every area of the world there are major soft drink producers. However, a few major North American companies are present in most of the countries of the world, such as Pepsi and Coca-Cola. Major North American producers other than the two previously-named companies include Cott, 7 Up, Dr Pepper Snapple Group, and Jones Soda.

Health concerns

The over-consumption of sugar-sweetened soft drinks is associated with obesity,[27][28][29][30]hypertension,[31]type 2 diabetes,[32]dental caries, and low nutrient levels.[29] Experimental studies tend to support a causal role for sugar-sweetened soft drinks in these ailments,[28][29] though this is challenged by other researchers.[33][34][35]

Obesity and weight-related diseases

From 1977 to 2002, Americans doubled their consumption of sweetened beverages[36]--a trend that was paralleled by doubling the prevalence of obesity.[37] The consumption of sugar-sweetened beverages is associated with weight and obesity, and changes in consumption can help predict changes in weight.[38]

The consumption of sugar-sweetened soft drinks can also be associated with many weight-related diseases, including diabetes,[32] metabolic syndrome and cardiovascular risk factors.[39]

Dental decay

Soft drinks displayed on grocery store shelves.

Most soft drinks contain high concentrations of simple carbohydrates: glucose, fructose, sucrose and other simple sugars. If oral bacteria ferment carbohydrates and produce acids that may dissolve tooth enamel and induce dental decay, then sweetened drinks may increase the risk of dental caries. The risk would be greater if the frequency of consumption is high.[40]

A large number of soda pops are acidic as are many fruits, sauces and other foods. Drinking acidic drinks over a long period and continuous sipping may erode the tooth enamel. A 2007 study determined that some flavored sparkling waters are as erosive or more so than orange juice.[41]

Using a drinking straw is often advised by dentists as the drink does not come into as much contact with the teeth. It has also been suggested that brushing teeth right after drinking soft drinks should be avoided as this can result in additional erosion to the teeth due to the presence of acid.[42]

Bone density and bone loss

A 2006 study of several thousand men and women, found that women who regularly drank cola-based sodas (three or more a day) had significantly lower bone mineral density (BMD) of about 4% in the hip compared to women who did not consumed colas.[43] The study found that the effect of regular consumption of cola sodas was not significant on men's BMD.[43]

Benzene

In 2006, the United Kingdom Food Standards Agency published the results of its survey of benzene levels in soft drinks,[44] which tested 150 products and found that four contained benzene levels above the World Health Organization (WHO) guidelines for drinking water.

The United States Food and Drug Administration released its own test results of several soft drinks containing benzoates and ascorbic or erythorbic acid. Five tested drinks contained benzene levels above the Environmental Protection Agency's recommended standard of 5 ppb. As of 2006, the FDA stated its belief that "the levels of benzene found in soft drinks and other beverages to date do not pose a safety concern for consumers".[45]

Kidney stones

A study published in the Clinical Journal of the American Society of Nephrology in 2013 concluded that consumption of soft drinks was associated with a 23% higher risk of developing kidney stones.[46]

Government regulation

Schools

Since at least 2006, debate on whether high-calorie soft drink vending machines should be allowed in schools has been on the rise. Opponents of the soft drink vending machines believe that soft drinks are a significant contributor to childhood obesity and tooth decay, and that allowing soft drink sales in schools encourages children to believe they are safe to consume in moderate to large quantities.[47] Opponents argue that schools have a responsibility to look after the health of the children in their care, and that allowing children easy access to soft drinks violates that responsibility.[48] Vending machine proponents believe that obesity is a complex issue and soft drinks are not the only cause.[49] A 2011 bill to tax soft drinks in California failed, with some opposing lawmakers arguing that parents--not the government--should be responsible for children's drink choices.[50]

On May 3, 2006, the Alliance for a Healthier Generation,[51]Cadbury Schweppes, The Coca-Cola Company, PepsiCo, and the American Beverage Association announced new guidelines[52] that will voluntarily remove high-calorie soft drinks from all U.S. schools.

On May 19, 2006, the British education secretary, Alan Johnson, announced new minimum nutrition standards for school food. Among a wide range of measures, from September 2006, school lunches will be free from carbonated drinks. Schools will also end the sale of junk food (including carbonated drinks) in vending machines and tuck shops.

In 2008, Samantha K Graff published an article in the Annals of the American Academy of Political and Social Science regarding the "First Amendment Implications of Restricting Food and Beverages Marketing in Schools". The article examines a school district's policy regarding limiting the sale and marketing of soda in public schools, and how certain policies can invoke a violation of the First Amendment. Due to district budget cuts and loss in state funding, many school districts allow commercial businesses to market and advertise their product (including junk food and soda) to public school students for additional revenue. Junk food and soda companies have acquired exclusive rights to vending machines throughout many public school campuses. Opponents of corporate marketing and advertising on school grounds urge school officials to restrict or limit a corporation's power to promote, market, and sell their product to school students. In the 1970s, the Supreme Court ruled that advertising was not a form of free expression, but a form of business practices which should be regulated by the government. In the 1976 case of Virginia State Board of Pharmacy v. Virginia Citizens Consumer Council,[53] the Supreme Court ruled that advertising, or "commercial speech", to some degree is protected under the First Amendment. To avoid a First Amendment challenge by corporations, public schools could create contracts that restrict the sale of certain product and advertising. Public schools can also ban the selling of all food and drink products on campus, while not infringing on a corporation's right to free speech.[54]

On December 13, 2010, President Obama signed the Healthy Hunger Free Kids Act of 2010[55] (effective in 2014) that mandates schools that receive federal funding must offer healthy snacks and drinks to students. The act bans the selling of soft drinks to students and requires schools to provide healthier options such as water, unflavored low-fat milk, 100% fruit and vegetable drinks or sugar-free carbonated drinks. The portion sizes available to students will be based on age: eight ounces for elementary schools, twelve ounces for middle and high schools. Proponents of the act predict the new mandate it will make it easier for students to make healthy drink choices while at school.[56]

In 2015, Terry-McElarth and colleagues published a study in the American Journal of Preventive Medicine on regular soda policies and their effect on school drink availability and student consumption. The purpose of the study was to determine the effectiveness of a program beginning in the 2014-2015 school year that requires schools participating in federally reimbursable meal programs to remove all competitive venues (a la carte cafeteria sales, vending machines, and stores/snack bars/carts), on the availability of unhealthy drinks at schools and student consumption. The study analyzed state- and school district-level policies mandating soda bans and found that state bans were associated with significantly lower school soda availability but district bans showed no significant associations. In addition, no significant correlation was observed between state policies and student consumption. Among student populations, state policy was directly associated with significantly lower school soda availability and indirectly associated with lower student consumption. The same was not observed for other student populations.[57]

Taxation

In the United States, legislators, health experts and consumer advocates are considering levying higher taxes on the sale of soft drinks and other sweetened products to help curb the epidemic of obesity among Americans, and its harmful impact on overall health. Some speculate that higher taxes could help reduce soda consumption.[58] Others say that taxes should help fund education to increase consumer awareness of the unhealthy effects of excessive soft drink consumption, and also help cover costs of caring for conditions resulting from overconsumption.[59] The food and drink industry holds considerable clout in Washington, DC, as it has contributed more than $50 million to legislators since 2000.[60]

In January 2013, a British lobby group called for the price of sugary fizzy drinks to be increased, with the money raised (an estimated £1 billion at 20p per litre) to be put towards a "Children's Future Fund", overseen by an independent body, which would encourage children to eat healthily in school.[61]

In 2017, the Kingdom of Saudi Arabia, the United Arab Emirates and the Kingdom of Bahrain imposed a 50% tax on soft drinks and a 100% tax on energy drinks to curb excess consumption of the commodity and for additional revenue.[62]

Bans

In March 2013, New York City's mayor Michael Bloomberg proposed to ban the sale of non-diet soft drinks larger than 16 ounces, except in convenience stores and supermarkets. A lawsuit against the ban was upheld by a state judge, who voiced concerns that the ban was "fraught with arbitrary and capricious consequences". Bloomberg announced that he would be appealing the verdict.[63][needs update]

See also

References

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