If the larger 100 qt sterilites are the ones I am thinking of they work alright for boas but the floor space really isn't as much as the measurements make it sound.. I personally use the 41 qt underbed wheeled 7" tall sterilites (they are 10-12 bucks each and work awesomely) I keep boas in them up to 5' and they are plenty big and are great ( think the measurements on them are 39" x 20" x 7" so you can fit 2 in the same space the other tubs would take)..
Also the multiple shelf one you linked isn't a good idea to use unless you do ALOT of modification to them. They are escape prone and I have seen people have animals get injured when people pull the drawers out when the snake has crawled partially up and out.
-----
Randall L Turner Jr.
