T-Rex Small Animal Play Chubes Petsmart (in store only) Product Description: What is a Chube? It's a colorful, safe, non-toxic cardboard tube that your small animal pet will use in a variety of ways. He'll play and hide in it, chew on it, and even curl up for a nap inside. Made from environmentally friendly resources, Chubes are the safe, economical way to add variety and fun to your small animal's habitat. Available in several sizes to accommodate all small animals. RattyRat's Review: A Chube works well enough for a tunnel. The problems we have with it is that it soaks up a lot of urine and being cardboard you can't wash them. This means this toy has a short life span before you would have to throw it away. That being the case, it is expensive for what it is. Drainage tubing is cheaper and much more durable, lasting a life time.