Pick up the Rockville Rugged Portable Waterproof Bluetooth Speaker for only $29.95 from eBay right now! (Reg $79.99) Shipping is also free.
This speaker is water resistant, or splash proof. You can take it with you into the shower, or by the pool side. With 20 watts powering it, it’s loud with pumping bass, but also has a long battery life with 18 hours of playback at 50% volume.