What inventions do you find useless or pretty much superfluous?

I was walking my dog this morning…and when I wanted the leash shorter, I wrapped it around my hand. I realized that this was essentially the same thing as using one of those leash-leader things where you push the button and it locks the leash or snaps it back depending on how long you want it. The only extra thing it seems to do is enable you to accidentally snap the leash back and freak your dog out.

So…I started to wonder what other “inventions” there are out there that claim to make our modern lives easier, but in the end are really DIY concepts fancied up to make us spend more money.

Anyone have any?