I use these tubs called lok-tops or something to that tune. I got them at the grocery store and the lid folds down on all 4 sides and locks. I did melt some holes into them because the humidity inside was getting too much; it evened things up great. They are about 8 inches by 10 inches, being 6 inches top to bottom.
-Jen. Back in the hobby after a hiatus!
Ball pythons:
0.1 normal; 1.1 albino. 1.0 pied; 0.1 het pied; 1.0 banana.
I used these this season to incubate 2 clutches and a sterilite 6qt tub for the surprise clutch. They worked out fine for substrateless, but if I don't catch them early enough this coming season, I'll need something taller. They wouldn't work if eggs are stuck together. They work well though for keeping heat and humidity in, and are nice and airtight.