I have experimented with several existing designs, but I wanted something different, so I created one:

- No contact with the inner bottle or the inner wall of the cap.

- No supports, adhesives, or fasteners are needed.

- Press fit installation with various color combinations.

- Compatible with 1L or 0.5L bottles.

Printing

• Use a thin layer height (0.08 mm) for printing the pole to improve the surface finish.
• Recommend 4 perimeter walls and 20% infill.
• For the drain, use 0 top layers, 0 bottom layers, and honeycomb infill.

Not recommended for use with glass bottles.