There are many boxes; but I couldn't find boxes that was good enough for me. I designed these with the following aspects in mind:

• Quick print. They are made to be printed in Vase mode
• Not plain rectangles. Rectangles lose their shape, and the sides often bulge
• Stackable

I printed then with a 0.4 nozzle and 0.6 line width for stability using vase (spiralize) mode. 2 bottom layers and no top layers. This makes them reasonable sturdy.

The 4x1 fits on an ender 3 print surface if you turn it 45 degrees.

You can of course print without using vase mode, just set infill to 0%, pick how many walls you want and use 0 top layers.

Creality

Ender 3 Pro

No

No

0,20

I printed with Vase mode, 0.6 linewidth (using a 0.4 nozzle).