I designed this shelf mainly to find a few suitable places to put my phone while charging it. I directly stuck it to the wall of the classroom with strong adhesive tape, so that students can use it anytime they need it.

Printing suggestions:
Please print the model upside down. This way, you don't need support structures and can ensure that the finished product is strong enough. It is recommended to use a thinner layer height and set a thicker shell wall thickness, about 3–4 layers, to further enhance the stability of the overall structure.