Design dilemma-I am trying to combine an under mount tub and shower in a very small bathroom. The double sink cabinet is right beside the tub. I thought that I would put white Caesar stone on the countertop, water falling down onto the white stone on the under mount tub. My dilemma is, that the stone on the tub is flat, and when we use the shower, will there be standing water left on the stone, over time--creating a mould or whatever problem? Is it a poor decision to use an under mount tub? How would I put a bath cabinet beside each other without the Caesar stone.