All it looks like to me is an overpriced styrofoam cooler. If I was looking into this item I would end up making my own for much cheaper. Even if you had to buy a whole new Herpstat just for this project, it would still be cheaper and you'll end up with a more reliable and trustworthy setup.

Not trying to bash Zoo-Med, I've had their 500R in the past with great success....I just personally trust Herpstat more, and they have more features.