Just about anything by Betterware. The one that sticks in my mind was the non-stick stick-on hook that lasted for all of a minute before falling off under its own weight. I ended up second guessing how the thing they were selling could possibly go wrong, and if I could think of something then I wouldn’t get it.

There is one Betterware item that’s lasted the years though. A hair trap for the sink. It’s a metal disk with holes punched in it. Hard for that not to work, really.

Also, increasingly, tat off Scamazon.