World Smallest Can of Beer??

You have seen some different sizes of can of beer in a shop but in Japan, you can find a variety of sizes from 135ml to 3L.
You can imagine sharing 3L of beer with your friends but you find it hard to understand why that small cans need to be sold for.
There is a reason. Before 135ml cans were sold, a survey was done and more than 40% of people who took the survey answered 「The first sip of beer is always the best!」And some answered「350ml is a little too much」or「 Beer gets warm before finifhing a big can」and so on.
You might think it is not worth drinking only a few sips of beer, but there must be a huge demand for the small can considering that it has been more than 10 years since it was released.