Those tubs don't have very much floor space. What you really want are the "under bed storage" style tubs like the IRIS CB-70, or sterilite 1960

The sterilite 1960 tub measures approximately 35" x 17" x 6" That size tub is what I consider the minimum for an adult BP.

For yonger snakes I would go with the sterilite 1655 (28 quart) tub that measures approximately 23 x 16 x 6