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Can of Coke
The reason, of course, in the sugar. At that time, as in a conventional cola contains about 11 teaspoons of pure sugar in the diet version instead added sweetener. Artificial sweeteners are hundreds of times more sweet than regular sugar, so the number and density of the bank are very small, and the bank itself floats like a cork. See also: Coca-Cola and Pepsi change recipe drinks. 20 years depending on the Coke. Coca-Cola has mixed the colors of Ukrainian flag on the posters for Euro 2012.
Source: pro-amour.ru/pochemu-banka-dieticheskoj-kolyi-vsplyivaet-v-vode.html