I couldn't find a dice tower that I liked so I made one myself. It's thin walled for quick and cheap printing, and has a folding dice tray that sits flush with the body when folded.

Print the tower upside-down, supports are built in for the dowels for the tray; snip off the little triangles after printing.

Print the tray as oriented.

Pictured print was done in PETG with a 0.8mm nozzle, 1.0-0.8mm variable line width and 0.32mm layer height.