Actually, I have asked myself that question many times. there is a website
www.tikiroom.com that will give you an entire list of cocktails that were very popular in the 50's along with the receipe's. (before they went metric in 1966
The most popular drink is coca cola. (In soda drinks).
The most popular car from 1964-1969 was the Pontiac GTO.
The most popular drink in china is green tea
pepsi that is the most popular drink and is the most attractive drink too it is what most people drink.
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Green tea is probably the most popular drink in Japan. If you are referring to alcohol, beer is probably the most popular drink (since it is much cheaper than sake).
The most popular drink in Germany is beer.
The best website for popular drink recipes is www.drinknation.com. This website includes a section for top rated drink recipes and most popular drink recipes.
Tea.
Vodka
margrarita
Coffee