Scosche boomBOTTLE+

No, it won’t hold your water, but you’ll want to forego hydration to carry a Scosche boomBOTTLE+ in your bike’s water bottle cage instead. This bluetooth speaker boasts the convenient go-anywhere shape of a standard water bottle that makes lugging it around that much easier, whether on your ride or in your pack’s side pockets. The ruggedized speaker is also loud thanks to two 55mm drivers and can withstand drops, vibrations, dust, and even (shallow) submersion in water. Else, a 6,000mAh li-ion battery lasts through 15 hours of playtime (and can charge your devices), it pairs with another boomBOTTLE+ for true stereo sound, and it features a 1/4 inch thread bottom plate for mounting on camera tripods or other similar mounting systems.

Grab one at Amazon – $180