This is a super basic toothbrush rack.  I wanted something to fit into the vanity cabinet so I wasn't leaving them in a cup on the counter.  I also wanted something I could rinse off the bottom of easily since these things seem to get nasty over time.

If I were to go back and redesign this, I'd make the notches for the toothbrushes smaller… they don't need to be that big.  I'd also add a texture of some sort, I was thinking of doing a raised checkerboard, on the bottom tray.  The toothbrushes are held fine, but they slide to the front of the tray and are at a steep angle such that they rest against the back of the vanity.  I'd want something to keep them more upright, and a simple raised checkerboard I think will do the trick.

Made from PLA.  Message me if you want the fusion 360 file.