I needed something simple to plant some lettuce in my window sill and decided to make this.
It works nicely and I have printed off quite a few and use them in a few of my window sills.
I put one outside and it did warp a bit due to the heat of the sun.
Version 3 adds a sloped bottom to make it sit centered in the bottom, I prefer version 1 and I just add supports, even without supports it still does fit inside the bottom i just sanded the overhang a bit.
I print using an Ender 3
Supports: Version 1 yes(unless you want to do some sanding, Version 3 no
.2 layer height