This bottle will leak, on occasion.

Pros: large size

Cons: leaks

My guinea pigs have used this same water bottle for almost a year. It is durable and doesn't leak like some do. Easy to refill.

Pros: Doesn't leak

Cons: none

These are pretty good.They are pretty leak proof.I like that they can hang on the outside of the cage,we have had little hamsters that like to chew.

Pros: they are the first that i have noticed don't leak

Cons: nothing

These feeders leak! They also hurt the animals tounge by scraping against metal. These are a very cute design however. These are also really hard to clean. A water bowl is much better for small animals.

Pros: Design

Cons: Leaks

The description enclosed give the buyer a well rounded view and ideas for use that other water bottle manufactures lack. My daughter has pet rats and the instructions helped her to train them easily!

Pros: finally a functional bottle

Cons: none