I made this bottleholder to stack 4 bottles in my fridge (saving space). Also I wanted to use as little material as possible. This construction can easily carry 4 bottles and works well for me but it seems a bit wobbly so feel free to modify (print thicker, add crosbrace etc).

You need 4x M4 screws (10mm) and 4x Nuts. The Nuts have a tight fit in the pillars. This was done on purpose, so I don't need glue. I heated the nuts with a lighter and pushed them in place. This worked well. If not you can always add glue.

I printed these on Anycubig Mega S at 200°C. Speed 70mm/s. Support touching Buildplate. Material PLA