Beats Pill

Less than 2 inches tall and around 7.5 inches long, the Beats Pill ($200) promises sound bigger than you'd expect given its minuscule size. It relies on Bluetooth, so you'll be able to change tracks directly from your phone or iPod without needing to visit a dock, and you'll be able to take calls easily using the built-in microphone. As you'd expect from any highly-portable speaker, it boasts a rechargeable battery good for all-day listening, but you might not expect the carabiner on the included carrying case, which makes it easy to clip onto a bag and go.