A shower box/stand for different stuff found around the shower (shower gel, shampoo, liquid soap etc).
It's made for a shower head support with a diameter of 25mm. If you have this diameter, this will stuck perfectly on it and will not sag.
I've printed using PETG, no supports and 100% infill (I think it might work fine even with a lower infill - haven't tried). I've tested 0.2 and 0.3 mm layer height, and stick with the 0.3 mm layer height as there is no major difference between. (I have a 0.4 mm print head)