It is a kind of portable stainless steel small beer keg. Mini beer kegs are also called as beer growler.

Normally capacity is 2L,3.6L, 4L,5L and 10L beer growlers. Among them 5L beer keg is more popular.

Nowadays, 10L beer growler also becomes popular in the market.

Mini beer kegs and growlers are popular in America market and Australia market. Now more and more craft breweries and beer bar like it.