When brought to the shore, many speakers suffer death by saltwater or spilled cooler – the EcoXBT, however, is purpose-built for the beach. Water- and shockproof, the sweet-sounding Bluetooth device boasts a rubberized shell that not only keeps its stereo speakers and six-watt amp safe but also allows it to float, so you can clip it to your kayak and pump tunes as you paddle. [$130; ecoxgear.com]