mugrack
I keep glass mugs in a chest freezer, stacked on printed racks. Enter your freezer or cooler and your mug, and this sizes the rack to fit, shows it, and gives you the STL files to print it.
choose a rack size
12.7 and 12.8 mm sockets hold a post tight in PETG on a Bambu P2S; 12.9 and up are loose. Other printers differ, so print the first if you're unsure.