Box with Lid

thingiverse

This builds a container of any dimension and a cover that fully encloses it. It configures both the container and the cover to print flat side down, eliminating the need for supports. The larger cover is designed to fit entirely over the bottom of the container. To utilize this feature, simply measure or estimate the dimensions of what you want to store, then specify the interior dimensions of the box. After that, determine how thick you want the walls to be and the rest will be handled automatically. You can also optionally add finger grips of any desired size to the cover, and there is a small adjustment factor available that allows you to fine-tune the size of the cover so it slides onto the container more smoothly.