Check out the top of the can when she pours it. This was back before the ring-pull was invented so you had to punch a hole in the top of the can.
Beer on the Box – Schaefer Beer
Beer on the Box – Schlitz Beer
How much of a breakthrough must it have been to not have to use an opener on beer cans? https://www.youtube.com/watch?v=dETlQ0PQhcU
BEER IS YOUR FRIEND 