We have the type of shower/tub with a curtain. The little ridge across the top of the tub at the front is supposed to keep the water from running off onto the floor. Even with the curtain closed and hanging on the inside of the tub water still gets all over the floor. The problem is that the little ridge is not high enough to do much good. I thought of a cheap, easy solution if anyone else has this problem.
I bought a piece of #40 PVC pipe, cut a slit the same width as the little ridge down the length of it, sanded the markings off, slipped it in place and caulked down the edges and ends. It's nice that it is rounded in case a bare foot accidentally steps on it. I think it will work well. Going to try it out next month at Lake Tahoe
Here are some pics: