Habitrail is a prouct made by the Hagen corporation, a series of translucent plastic tubes and "houses" for use in home terrariums, designed especially for small pets such as mice or hamsters. The design of the Habitrail is modular and can be configured however the owner likes, as well as dissasembled for cleaning. The Habitrail is meant to mimic the habitat of the animal in question, usually a series of underground warrens and tunnels. The mascot for Habitrail is "Herbie the Hamster" who even has a video game based on him called Hamster Ball.