Beer has come a long way since breweries first had the idea of developing can packaging nearly 100 years ago. In the early 1900s, breweries had a problem producing a can that would withstand the pasteurization process and allow the beer to still taste good when it reached the consumer. In order to withstand the heat and pressure of the process, the first beer cans were constructed of tin and steel and were much more thick and sturdy than the ones we see today. By 1935, the first commercially produced beer in a can hit the market.
Some of the vintage cans are so cool--I love the art deco look of Krueger's. Very interesting to read--and see--the evolution of beer in a can.
(Thanks designsoft, via Twitter)