As we are currently unable to get in the ryerson water bottles, these are the replacement ones we've been able to get ahold of!
  There's two different sizes of bottle, you can see in the one pic which compares the two sizes. This listing is for the SMALLER of the two sizes.
  These bottles are what we use with our herd. They are glass, so they are chew proof and easy to use. They come with a metal holder to hook onto your cage.