Insulated water bottle bottom protector

I always end up with dents on the bottom of my insulated water bottles before long, and it seems to affect the insulation capability of the bottles as well. This is a cover for the bottom to protect it from dents. 

Printed with AmazonBasics black TPU. FCStd (FreeCAD) file included, it can be adjusted for various water bottle sizes. It should work in other materials but it's going to be harder to get the exact fit, which is why I just went with TPU.

EDIT: I have changed the bottle size to 100mm diameter. This means that you can easily make this fit any bottle by scaling in the slicer, e.g. if your bottle is 77mm diameter, just scale X and Y to 77% and leave Z at 100%.