I keep my black milk in a 15q sterillite tub from WalMart. I used a 1/4" soldering wand to put some holes in it, and for right now he's not strong enough to push on the lid so the two clips on the end are fine. I used bungees with my larger (and incredibly smart) ball python and she couldn't defeat them. I'm planning on using the same tactic for this guy.

Just out of curiosity, did you name yours? Mine still needs a name. I was going to call him Adonis because he's so drop-dead gorgeous and will only get prettier with age, but something about it doesn't click. He's in shed right now or I'd post pictures.