We've had something like this for opening the odd stuck jam jar or bottle lid for over 20 years and while not used often, it's been very useful to have around.

We also have an electric jar opener somewhere but I took it out of circulation. It's beyond me why but both parents were capable of thinking it was the tin opener and getting it quite stuck - I had some struggles freeing it.

Oh and I don't know if others do it but a family thing anyway. When you do pass the item with the top to someone else and they open it with ease, you say "I must have loosened it".