I'm sure others will have other comments, but: that style tub (lid) will not keep a snake in reliably. They can and will push their way out. Snakes are both not stupid and not weak, and they have lots of time to combine their cleverness and strength to make an escape.
Maybe with a number of binder clips holding the top to the bottom? Snake escapes are best prevented, for sure.
Rudeness is the weak man's imitation of strength. Eric Hoffer(1902 - 1983)
“The greatness of a nation and its moral progress can be judged by the way its animals are treated.” ~ Gandhi