The GRIPSTIC https://www.gripstic.com/ bag sealers are vastly superior to bag clips, but they always got scattered around my kitchen drawer and I had to hunt for them. Now each size has a place to live so I can easily grab the size I need.

I include the OpenSCAD so you could modify this for similar objects.

I used the PrusaSlicer dovetail cut tool to separate the model into two parts that would fit on my MK4 print bed. The printed parts fit together well enough that I didn't bother with glue.