Like the Fujitsu waterproof phone, Uniden's WXI477 lets you take your talk into the shower. Unlike the Fujitsu, you're going to feel like a dunce taking this out of the house, since it's just a 5.8 GHz cordless phone.
The WX works when you're in the bath, in the shower, in the pool, or even when you're dunking your head in the sink to train holding your breath, David Blaine style. But really, do you need to take your conversations into the shower with you? Are you that dirty or is the person you're talking to that important that you can't hold off for a few minutes while you do one or the other?