funny you would ask that; about ten minutes ago i walking into the "pet room" and found the lid to the new tank i had set up for one of my albino corns pushed back about an inch and she was gone. after a few panicked moments i realized to my great relief she was inside the wire mouse cage chowing down on my pet mouse (sad but worthy sacrifice for keeping my girl distracted long enough to find her). Now her tank is all taped up, and i've found duct tape to work extrodinarily well in these types of situations. so there is my advice, no matter what there is a good chance you'll have some problems, duct tape can be a snake saver!!
ps. the type of lid i was using was a plastic, and i have had trouble in the past with all kinds of plastic lids. the best thing that i've found to use by far are the metal wire lids, with a couple of heavy books or rocks put on the corners, where they don't bend the wire cover inward.
-spangles
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Pets:
1.1.0 Albino Corns
0.1.0 Normal Corn
2.0.0 Green Iguanas
0.0.1 Florida King Snake
0.1.0 Rat Snake