Anchor to the wall behind door to keep it open.

When there's stuff that's pushing the door back closed or the doorframe is leaning inward doors tend to become very annoying especially when you have to shuffle through it a lot. Use this door catch to secure it in place.

I printed this in 98A TPU which is quite a bit sturdier than regular flexible TPU but won't snap under tension like PLA. PETG is also an option. 0.3 mm layer height, 3 to 4 walls, 15% to 25% zig-zag infill, and a minimum of 4 top and bottom layers.