Those are Sterilite 7 Quarts tubs which I bought here http://www.walmart.com/ip/Sterilite-...of-14/15524838, I can fit clutches of 9 eggs in them if I separate the eggs.
I have those and a few 15 quarts which are the same height.
I can incubate 20 ((10) 7 quarts + (10) 15 quarts tubs) to 30 clutches ((30) 7 Quarts Tubs)