Cone-top cans appealed to customers because they were easy to pour, and they were popular with brewers because the cans could be slotted into existing bottling lines. There were low-profile cone tops and high-profiles ones, as well as mid-profile J-spout cans, all of which were assembled from three pieces of metal. The exception to this rule was the Crowntainer, whose concave base anchored that can’s one-piece body.
Flat tops were simpler to make and cheaper to ship than cone tops—in the end, that won the day. Because flat-top cans were ubiquitous compared to cone-top cans, which had all but disappeared by the end of the 1950s, cone tops are generally more sought after by collectors.
Another subset of beer-can collecting focuses on cans made during World War II. All beer sent to the military, which was supposed to account for 15 percent of each brewer’s output, had less alcohol in it than beer brewed for domestic consumption (3.2 percent versus 4-to-7 percent). That’s one differentiator to look for when trying to date a potential war-era can, which should also have a statement on it that reads, "Withdrawn Free of Internal Revenue Tax for Exportation." By 1944, the domestic labels used for canned military-bound beer were replaced with olive-drab packaging, which makes these cans even easier to identify.
In the postwar years, all flat-top cans had to be opened manually with a church key. In 1960, Burger Brewing of Cincinnati introduced a steel can with an aluminum lid to make this task easier for consumers. But the major change in beer cans occurred in 1962, when Pittsburgh’s Iron City Brewing canned its beer in Alcoa-made zip-top cans. Over the next two years, numerous different types of zip-top cans would be introduced, some with no instructions on the can’s tops, others with sharp edges on the tab itself, and a few that left an opening in the top of the can that collectors refer to as a dogbone for its shape. Schiltz called its zip tops "pop tops." Call them what you like, but these small, sharp strips of metal littered beaches and parks until 1975, when they were replaced by stay tabs.


Berghoff Beer can variations caused b…
Minnesota beer cans












