Summary

I made this so that I could easily remove and refill water bottles in my Critter Nation rat cage.

Instructions

It fits the 16 oz glass LIXIT bottles:
http://www.amazon.com/gp/product/B0002QI5WM/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

I used brass threaded inserts and thumb screws to attach it to the side of the cage. The threaded inserts are easily installed from the bottle side with a soldering iron. These can be ordered from McMaster.com. Part numbers:
93365A142
91185A285

For "straps" I used silicone hair ties, but rubber bands probably work just as well.

Water bottle holder for critter nation