Bedside bottle holder

This is a bottle holder which you can just put on the side of a bed or whatever with approx. 29mm diameter. See picture for explanation. :-)

I made this for my grandma but maybe someone will find this useful, too.

I printed this in bright orange, because my grandmother almost can't see anything but she always finds this bright color, so she can put her bottle of water there and always finds it again. It works so great that I printed another one in bright yellow for some other stuff like