The small space between the shower and vanity serves as a great place to store extra towels or bathmats..I also open the cabinet door and hang the cloths on it before getting in the shower. Every little space helps!
If your shower enclosure is like mine,water seeps under it and collects in the rim of the shower pan. That bottom towel wont take long to absorb water and ruin the side of you cabinet. Keep a close eye on it.
I agree with Bama. The Cardinal that we had also leaked water from the shower onto the floor. I kept a spare washcloth between the shower pan and vanity to soak it up.