How to use PureVis Cap? 1. Fill up anywhere The LARQ Bottle PureVis Cap gives you the power to take brilliantly clean water with you everywhere you go. 2. Press the cap for PureVis While you wait, give the bottle a gentle shake or do your best water dance to spread the PureVis light evenly. 3. And voila! Enjoy brilliantly clean water from a clean bottle. It's that simple. FAQ What is PureVis technology? PureVis technology uses 270-275 nanometer spectrum to neutralize up to 99% of bacteria such as E.coli by breaking down their DNA before they have a chance to spread, improving the quality of your water. At the minimum, the bottle should be filled with water that is clear to the eyes and does not contain any physical sediment as PureVis technology will not remove these impurities from the water. The UV-C LED chip in the LARQ Bottle PureVis Cap are smaller, more energy efficient, non-toxic (mercury-free), and more economical compared to traditional Mercury-based UV technology. Can I wash the cap? The cap is waterproof IPX7-rated, so you are able to hand wash the cap if needed. Please ensure that the cap is completely dry before charging to avoid the risk of injury. What type of battery is used in the LARQ Bottle PureVis? The LARQ Bottle PureVis uses a Li-Polymer battery, similar to the one you would find in your smartphone. Compatible with LARQ Bottles LARQ Bottle Filtered A revolutionary portable water filtration system that combines high-performance Nano Zero filter technology with zerovalent iron providing a seamless, low-pressure drinking experience. LARQ Bottle Flip Top The LARQ Bottle Flip Top features an easy-access straw. It’s double-wall vacuum insulated to keep water cold for up to 24 hours and the silicone-coated detachable carabiner makes on-the-go hydration that much easier. LARQ Bottle Twist Top The LARQ Bottle Twist Top features double-wall vacuum insulation to keep water cold for up to 24 hours and hot for 12 hours. pPerfect for the office, a weekend snow trip, and staying hydrated wherever your adventures take you.