A clip to lock the IKEA SAMLA boxes so the lid does not fall off. Based on a previous work of _stew_. This version fits for the SAMLA boxes with 5l/1gal, 11l/3gal or 22l/6gal. Other sizes are in development, see the GitHub link below.
The STL is a pre-rendered version with a length of 40mm. The OpenSCAD script is more customizable, but needs obiscad.
This thing is maintained on GitHub: https://github.com/rohieb/ikea-samla-locking-clip
Prints good with any layer height. If you have a logo or text, they can benefit from smaller layer heights. Also no need for infil, just print multiple perimeters. For example, with a 0.35 mm nozzle, 3 perimeters are enough to fill the whole body of the clip.
If the clip is too tight or too lose for your box, you can heat it slighty with a lighter, torch, blow-dryer or heat gun, clip it to your box with the lid, form it by hand so it fits tightly, and let it cool.