Bathroom Toy Box

A toy box for my bath toys. It fits under my kitchen helper:

https://www.thingiverse.com/thing:2418953

I built this a while ago. It's not perfect, specifically, the ends aren't restricted enough to stay upright, so I wish I would have made two hooks from the sides into the ends, but with a friction fit, it works well.

After 6 months of use, it turns out the bottoms are warping a bit, due to standing water, but I took it apart, and flipped them so they cup down and it hasn't gotten wors