Steripen ultra portable uv water purifier teal bluegold product details meet ultra the device that smiles back ultra is the most advanced uv water purifer in the world rechargeable for up to 8000 liters ultra will deliver around 50 liters of uv purification before needing to power up redesigned firmware and interface deliver the fastest most seamless user experience ever features high contrast user friendly oled display internal battery is usb rechargeable via computer outlet or po