The early metal beverage can was made out steel. In order to open a can, consumer needs a tool called “Church key” with a sharp point. The can was opened by punching two holes in the lid¬–a larger one for drinking, and a small one to admit air.
Iron Cit Brewing in Pittsburgh tested the first pull-tab in 1962 in Virginia. The first generation pull-tab had lots of sharp edges on the opening, and there were complaints from customers about cut fingers and lips. And some people also needed some instruction on how to use the pull-tab. . By 1965 three quarters of breweries in the U.S. were using them, and are still using the pull-tab can today for most soft drinks.
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