I made this simple hook to hold the toilet brush off the toilet tank as well as another form to hold the mirror on my shower caddy in the shower. Pretty basic -- just put in the dimensions you need to hang stuff and the lip you're going to clip it over.I originally designed it so the lip could be bigger than the hook itself, but then I realized that makes it harder to print, as you'd need supports. The model still has this feature if you need it, but for ease of printing, I'd keep hook_thickness = lip_thickness.