Cup Holder to Bottle Adapter

This is a little project I'm working on. I have yet to print this, but was hoping to design a generic cup holder-to-water bottle adapter.

Please comment if you have suggestions.

Dimensions

• Overall height: 136mm

Cup Holder (bottom)

• Maximum diameter: 63mm
• Bottom (narrow) height: 55mm

Water Bottle (top)

• Inner diameter: 100mm
• Outer diameter: 110mm
• Height: 65mm