*TWINWALL STAINLESS STEEL CONTRUCTION - Ensures that the water is kept cool for up to 24 hours and if hot water is used in the bottle, this will also keep the temperature for up to 12 hours;**SAFE TO DRINK WATER - Philips Advanced UVC-LED self cleans and eradicates 99.9% of bacteria and viruses, making water safe to drink anywhere, anytime. 946ml capacity;