Escape problems

[EdgyExoticReptiles]

cardboard duck taped down?

I need some help guys. ):
I just got done making some new "vivs" for my herps out of 30 gallon rubbermaid rough neck bins. They're tilted on the side so the "front" of the viv comes off and is screened; problem is there's a little leeway between the lid rim and the container rim. So of course one of my snakes has escaped. Twice. I've found her *my big parietalis*; once in the bathroom at about 10 yesterday and 5 in the morning today. So I need some ideas for what to put between the lid and the rim to "seal it off."

[Zephyr]

cardboard duck taped down?

It could work... I'll try it.
I have my room sealed off anyways.