Self-cleaning every 2 hours with UV-C LED technology. Eliminates up to 99.99 % of bacteria. Double-walled vacuum insulation: 24 h cold and 12 h hot. Li-polymer battery keeps your bottle running for up to 1 month on a single charge. Two water purification modes. Ready for adventure ? Purify your water on the go - anytime, anywhere. This state-of-the-art bottle is capable of purifying itself. Using environmentally friendly UV-C technology, the bottle can purify up to 99.99% of bacteria and viruses. Ultraviolet light in the C spectrum (UV-C) is a high-energy light with a wavelength of 200-400 nanometres. It works by killing microorganisms, rendering them inactive and destroying their DNA so they can no longer reproduce. The UV-C light neutralises all harmful bacteria, making the water drinkable. Fill the bottle with water. Screw on the cap and press it to start purifying your water. The bottle has two modes, Normal and Adventure. Press the button once for Normal mode or twice for Adventure mode. Normal mode is indicated by a breathing sky blue light, Adventure mode is indicated by a pulsating blue light. You should shake the bottle gently during the cleaning cycle so that the UV light can distribute evenly in the water. The bottle also cleans itself every 2 hours, performing a 10-second cycle to intelligently clean every crevice of your bottle. You can turn this feature off if you need to store your water bottle by pressing and holding the button for 5 seconds. This activates the Travel Lock and prevents your bottle from cleaning itself until it is switched on again.