Meet the Baserock Hydration Backpack: a wearable solution that not only keep you hydrated but also helps you feel the music via vibration. It comes with 30 watts of power and 8 hours of battery. You get 2 liter hydration capacity and plenty of storage space for your things.
The backpack has a microphone to listen to live music. You can also attach your favorite music players through an auxiliary input. Expected to ship early next year.