Life Magazine has a hilarious post up featuring what they consider to be the 30 dumbest inventions of all time. When you look through the list, filled with things like the shower hat to the right, you actually start to get an appreciation for things like the Snuggie.
Almost all of the inventions are from the sixties or before, so it's not too shocking that many of them involve cigarettes, including a method for a couple to share a smoke and one for a person to smoke a whole pack at once -oh joy!
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The mini TV and the TV glasses look like stuff we have today (iPod anyone?) while the rocket pack was considered a viable method of infantry transport for a while. There's a working Birdman suit now (didn't Neatorama feature it?) and I'll bet the flying platform ended up as the basis for NASA's lunar lander test vehicle. Oh, and I think we call the external turkey roaster a rotisserie cooker these days.