Made this beer holder for my shower. The pipe it's attached to is ~19.7mm but it can fit pipes smaller and slightly larger. The black on the base and center of the holder is just there because my print messed up and had layer separation at one spot, it's not part of the model but i included the two files (base and fill) in case you want it multi-colour

Print lying down on it's back (can print standing up, the cut out was made so it doesn't need supports)