I went through my cupboard. I am embarrassed to say all these cans are outdated. I found one from 2009. Ooops. I was putting them in this box to toss....then thought it would be fun to see what the kids would do with them. Sooo....I put the box in the block area. So far they have been here for almost an hour!! They make a very cool 'crash' sound when they fall!!