Inspired by ketem_studio clipper - but drawn from the scratch with bigger teeth and thicker body. There is no way that this clip will release your bag :)
UPDATE:
I added two additional variants of the clip - if you have problems with opening clip after printing, try the weaker or weakest one (both have wider spacing between teeth)
BagClip-weaker.stl | 65.4KB | |
BagClip-weakest.stl | 64.8KB | |
BagClip.stl | 65.1KB |