This go-everywhere Bluetooth speaker comes in a variety of cool colors and patterns. The Roll 2 even comes with its own inflatable float, so you can take your music into the pool. (Editor's note: "Don't forget to take your smartphone out of your swimsuit before you dive in".) It can survive 30 minutes in up to a meter of water without self-destructing. On a single charge it will give you a day at the beach (it claims a 9 hour battery life, but your mileage may vary). The app allows you connect two in stereo, if your budget allows. By the way it has a 3.5 mm audio input jack in case you want to have it work with a device that doesn't have Bluetooth. One of its most novel features is that three people can connect to it once, serving up music from multiple devices. If you're on a strict budget you can find the slightly less loud, less advanced original model, the Ultimate Ears Roll, on Amazon for about $40 less. It is a steal at that price.
