The Fondue Set
Used once, kept for thirty years.
A wedding present that came out for one dinner party in 1976 and then lived at the back of a cupboard.
The colour-coded forks, the little burner, the cheese that split and went stringy. The entire concept was fashionable for approximately two years.
They survive in enormous numbers precisely because nobody used them enough to break them.
Cost back then
£4 19s
Goes for now
£5 in any charity shop, £30 for a boxed orange one