cold cut tray clips
Clips to hold down the plastic foil lid on those plastic trays cold cuts (»Aufschnitt«) and sliced cheese are sold in (at least in Germany). They should also work great on quark pots. when you can get that stuff.
I usually use three of these for the three edges i peel the lid off of.
There are a few different thicknesses for differently sizes packs. I just write the sizes on the clips after printing.
The round clips are intended for yoghurt and cream (»Sahne«) pots and the like. I don’t use them that often and don’t know if they are the right width. Write a comment if you need them thicker or thinner.
I found that the straight clips are easier to handle than the corner clips i designed first, but i’ll include those anyway.