I needed some storage space for soaps and shampoo bars in the shower, so I designed this soap tray with built in drain holes. It uses four 30mm rubber suckers to stick to the shower walls which I got here: https://amzn.com/B073S5TX8W
I printed in PETG (PLA won't like the warm-wet atmosphere in your shower unless you coat it in something).
The author hasn't provided the model origin yet.