You know I've always heard this, and yes, the middles do bend up a bit.
I've used locking tubs for almost 2 years and had no escapes(except when I left it unlocked), even with a 3500 gram female, and currently three 2200 gram plus females and numerous 1000+ gram snakes.
I use sterilite ultras(grey handled) and green handled sterilites in 6qt, 15qt, 34qt and 40qt sizes.
That said it's still not a bad idea to cover your bases, especially if the snake can get lost in the house![]()