We have always had these to provide water for our hamsters. They work great and because they attach to the outside of the cage it provides more space to add a toy. Very easy to use.

Pros: easy to use

Cons: none

this bottle is leak proof and easy for the hamsters to drink from. It is nice to have these bottles that clip to the outside of the cage, that way the hamsters can't chew on the plastic parts and it doesn't take up room inside the cages. It is so cute to look at their little "hands" holding onto the spout part while they drink. This water bottle does everything you would need when providing a water source for your hamster.

Pros: always guarentees fresh clean water

Cons: nothing

This is a must have, with a hampster. works great

Pros: good

Cons: none