I've been searching around for the simplest possible squeezer and they all seem so unnecessarily bulky or complex. This is the most minimal, functional, easiest to use, simplest to print, no frills tube squeezer that is sized to accept standard toothpaste tubes but also works with hand lotion tubes.

There are 2 versions, a single squeezer, and a double. If you want to fold the tube in half it will stay folded. I've been testing this using pla+ it's been by the sink, getting splashed and it has been fine. You may want to use petg. Should print the same way.

The double print starts off with 2 tiny dots, if you have adhesion issues these dots may not stick. For me, it was fine.