Can Lid

The cheap moulded plastic food can closures are made to such tight cost limits they inevitably fracture and tear apart especially if put in the fridge a lot, and washed in very hot water. Friends with a small dog that only needed a 1/2-can of food at a meal went through a few and asked if I could come up with a better one that could take a lot of use. This design is as basic as it gets & was my 1st tinkercad effort, but it does the job pretty well.

The stl is of the original which I printed in PLA (all I had to hand). So it had to be a little bit loose to snap over the metal roll-over rim on the can without breaking. Still worked fine though and if it rattling around is a bother, you can paint the inside with some epoxy or latex adhesive. That isn't OK for long-term food storage, but a day or two wouldn't present any appreciable risk of contamination. Of course, don't put PLA ones in the dishwasher! Unless you like modern art! Apparently my friend forgot PLA's glass temp of 55°C is