I would think that the 4X2X2 vivaria would work for a pair of small garters. You would have to make completely sure though that they were parasite free......this type of environment lends its self to be a parasite breeding ground. I am with James though.....I'm WAY too paranoid about the health of my snakes to go with something like that. Not saying it can't work though and like he had said, I'd like to hear from someone who's used it and had success. Hmmmmm....maybe I need to go out and get "The Art of Keeping Snakes..."
Roy