My corns were in tubs for a long time... and while they didn't escape, it was not sufficient for them. This is a *really* active species and they need a large container if we want to be taking *good* care rather than bare minimum for survival. A 20 gallon long is the bare minimum for an adult corn. Much more ideal is a 40 gallon breeder. My own corns are now all in caging that is 36" by 18" on floor space and I wish I could have gotten larger caging for them but we barely got these units into my house as is and I spent a few thousand on housing for 14 snakes. My largest boy is still crazy cramped in that and next year, once I save up money again, he'll be getting a 4ft by 2ft cage as he is 5 1/2 feet long.