

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.
It’s an abbreviation for Command Line Interface To Objects Residing In System. A lot of male programmers can’t find it.