A can of booze that isn't quite the normal size of a can, normally Carlsberg. People who drink this tend to be rather effeminate and prefer to drink these 'baby cans' rather than cans for adults. You also must pay more money for these as you are paying for the privilege of not being a real man.
Dude 1 : Hey dude, are those Morrin Cans? Couldn't you find the proper sized ones?
Dude 2 : Aww shit, he's on the Morrin Cans. I didn't know he was a wimp.