I love this Kong toy, I have two different sizes for my dog, who is a black Labrador Retriever, and regularly fill both with a mixture of peanut butter and yogurt with dog kibble for good measure. It can also be frozen, which makes the treat inside last longer, and gives your dog more of a challenge.
I recently received a regular red Kong toy as a gift. My dog had destroyed it after only about 10 minutes. He has had both black Kongs for over a year and they're still in great shape. They are just now starting to show signs of wear.
I would recommend this product to anyone with dogs that love to chew. It comes in several sizes, so make sure to get the one that is the right size for your dog.

Pros: super durable, can be filled with treats

Cons: difficult to clean