The All Clear water bottle from Camelbak has a UV light in the cap that purifies water in 60 seconds. You simply fill the bottle from a stream, tap, or spigot, replace the cap and turn on the UV light, and you’ll have safe drinking water in 60 seconds. The All Clear utilizes proven UV technology to effectively neutralize microbiological contaminants. The lamp is protected inside an impact and weather-resistant cap. It’s powered by a rechargeable battery that can purify 80 cycles (or 16 gallons) of water between charges. The bottle is $99. Check the product page for online retailers.