This is the most simple of designs. It's a 150mm hollow cube meant to hold used Keurig K-Cups until they can be recycled and/or disposed of.

I created it to sit on top of https://makerworld.com/en/models/384617 

If I get a wild hair, I may update this later with shorter versions. Honestly if I can make this in Fusion 360, so can you. It's worth learning!