i like that the critters can't get their teeth on to the bottle as easy. works well with lots of small animals - not big enough bottle for bunnies though.

Pros: works

Cons: none

I really like these they are a life saver on my rabbit water bottles.Some how they seem to always chew the water bottle so it leaks and these stop them from doing that.

Pros: durable

Cons: none

These work well, but they eventually start to rust and don't look so nice.

Pros: GOOD PRODUCT

Cons: RUSTS

When I have extra guinea pigs here temporarily overnight, I might not have enough regular cages for all of them. I have used extra large rubbermaid tubs to temporarily hold them until I could get them to the rescue. (not recommended as a permanent cage due to lack of good air circulation). This holder can be used to hold a water bottle. I also use one in a cage that has the wire bars far apart where the standard wire holder slides back and forth. Good product.

Pros: Wide holder hangs bottles securely

Cons: metal construction isn't very attractive

this is a true wonder. I am glad they did it.

Pros: works great

Cons: n/a