This is an egg tray I designed for my sister's fridge. It was 5x2 originally, but I decided to parametrise it in OnShape. You can find it here: https://cad.onshape.com/documents/7ac371b5806469f08126c29a/w/2156570f9897e4d594a6cff8/e/e5977b458e3c852f402b43bf
Here you can find STL for all sizes between 2x2 to 8x3. If you need a different size just leave a comment and I'll add it.
Walls are 2mm thick, and the base is also 2mm thick. It's solid enough with that thickness.
I printed this with a 0.8mm nozzle with 1mm line width and 0.5mm layer height, so the base is only 4 layers and the “support” is only 2 walls. I printed it at 40mm/s because I didn't push it too hard, but it's an easy print and can print faster if your heater block can sustain the temperature.
The author marked this model as their own original creation.