A recreational chewy toy for your pet Ideal for hamsters, gerbils, mice and similar size pets. Made from 100% safe, environmentally friendly vegetable parchment. Chewi-tubes help promote: Exercise and stimulation for a healthier and happier pet. Gnawing, to keep teeth in good order. Natural burrowing instincts. Chewi-tubes can be an ideal den for your pet to hide in and feel safe.