A later father-and-son sketch (with the politically correct "Caveperson Days" title...
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): Cave-Bert complains that Cave-Ernie spends too much time playing his drum to help take out the trash, which involves carrying one piece of junk to the dump each time. Eventually, an angry Cave-Bert turns Cave-Ernie's drum upside-down to stop him from playing. Cave-Ernie accidentally discovers the wastebasket when he notices that the drum can carry many pieces of trash at once, saving his father work and time. Cave-Bert rewards his son with a new drum--which looks remarkably like a modern metal trash can.