I think that some types of snakes are designed for use wih plastic tubs (BP, etc) whereas other species (Emrald tree boas) are probably easier housed in a glass tank. Come to think of it, most tanks (non exoterra) still open from the top. So I think it depends on your judgement. Anything CAN be put in a tub, but wether it should depends on your honest, soul searching evaluation of your animal's well being