J.H.
I always used a baby tub in the regular tub. There is some bending, but it never bothered me. We had a Fisher Price tub that had a 3 in 1 system--a mesh hammock for the newborn, and then the tub was divided into two parts, one "deep" end for a bigger baby, and a side with a back rest for a younger one. It also had toys that were attached to it and was easy to clean.