20 oz double-walled stainless steeel vacuum bottlegive easy access to clean water all day, no matter where you goUV light on lidInput: 3.7VBattery Capacity: 300 mAh (approx. 30 time use without charging) Charging Method: Micro USB Port (2.5hr to fully charge) UV Light operates for 30 cycles with each charge. Allows your beverage to stay cold for 24 hours/hot for 12 hours. Measurements: H 8" x Dia 2.875" Inner Liner Mtrl: #304 (0.40mm) Outer Layer Mtrl: #304 (0.40mm) Waveleng