I got sick and tired of the trash bags falling into the bin when they got filled so I printed out a bunch of different existing designs to try them out. Unfortunately, none of them worked very well for me: they were too loose and did not grip the trash bag well or had a sharp end and would tear the bag.

Thus, I created these. One with a small hoop at the top, one with a medium sized hoop and one with a large hoop depending on the size or your trashcan lip. I also made a grooved design so that it would grip but not tear the bag.

I realized most trash bins have the lip only in one direction and one side is flush, so having the hoop centered was not helpful.

I printed these models in both PLA and PETG with standard settings and 0.2mm layer heights and they both function well when paired with a trash bin with the appropriate size lip.