Do you "Google?"

Q: What do zippers, baby oil, brassieres and trampolines have in common?

A: No, the answer isn't that they're all part of the setup for a highly inappropriate joke. In fact, the above list (along with thermos, cellophane, escalator, elevator, dry ice and many more) are all words that fell victim to those products' very success and, as they became more and more popular, slipped from trademarked status into common usage.