hey jamie, i'm using 41qt sterlites. about the same footprint as cb-70's. i also use 32qt. sterilites, and 6 qt for babies. for the babies i use paper towels. the 32 qts i cut off 21" of the 18" roll. for the 41 qts i cut 31 inches off the roll. then i fold and press it down in the tub so it covers the bottom and ramps up the sides a little.
vaughn