securing sterlite top??

For those of you that use a 116 qt sterile for an enclosure, how do you secure the top? Mine came with the securing lid (secured on each of the ends by the handles), but it seems like the lid might be able to be pushed up enough in the middle that a bp could maybe crawl out.
Any suggestions on how to secure it better would be appreciated...thanks

Bungee cords, small c-clamps, drill a hole in the lip of the lid and the enclosure itself and put a bolt and nut in it. All of those should work. I am using the c-clamp method :)

I use medium binder clips, they work great! Easier than bungee cords too. I just use three on each side.

Yeah, I use large clips... not sure what they're called but they're used for holding papers or something.

Those are probably binder clips.

I use a 48" bungie cord on Butter's cage (she's in a 96 qt, I think), and Issa's tank has two backpack material type straps on it.

I know somebody who uses velcro strips,they work great and really hold too.

I was using those huge paper clips before, but I don't bother anymore. Those clip sterilite lids are pretty secure. Just make sure they've fastened properly.

I use a vehicle cargo net that's essentially like a few bungee cords woven together with three hooks for each side of the enclosure.

I use sterilite containers and there side fastners are VERY secure when snapped into place. You MUST ensure they are snapped. You can always use the big clips or clamps but I have yet to have any escape.

Bungee cors strapped down to the side of the industrial shelving unit they sit on.