What do you look for in a shower curtain? How about one that won't poison you?
We recommend curtains made from nylon rather than PVC-based vinyl ("poison plastic"), which isn't good for the environment or for you. Treehugger recommends hemp curtains, but we've heard that they can be hard to keep clean.
Whether you go for hemp or not, a simple white nylon curtain liner, like the ones used in hotels, will solve this problem. Nylon dries fast, resists mildew and can be tossed in the washing machine periodically for a good showering of its own.