My neice's dad drank beer out of cans, so when she started talking she called the kind of cans beer (or soda or ice tea or whatever) comes in "beer". My son, who is 3 months younger than her, thought she was the true authority about what to call things, so he called those cans "beer" too. We don't drink and we don't buy soda or anything else in that kind of can, so I guess it made as much sense as anything else to him.
Several times we were in the mall or someplace with a soda machine and he would loudly shout and point or whine for "beer" from those darn machines!
They did this for a loooooong time, everywhere we went, whatever kind of shaker they saw. They just thought salt and pepper were made of beer!!! I had to explain this a lot...
Also, DD just hollered at the top of her lungs from the other room, "What the hell do you think you're doing??" She listens to her Dad too much. : At least she hasn't picked up on some other things he says way too often.