These Coke cans are from back in the 1930s, just after Coca Cola stopped using cocaine as an ingredient, and before Coke was sold in a can that didn't look like a paint thinner container.
It's fascinating to see an everyday beverage packaged in a container that by today's norms, one wouldn't expect anything edible to come from. It would be a lot of fun to have one of these bad boys on your shelf as a relic of the past, but I just checked ebay, and most are selling for over $500 (wowza!).
(Image from wikipedia)