Waatr PureMax 4D. 4D purification® technology. Pro-self-cleaning bottle. 2x 20mW UVC leds. Destroys bio-contaminants. 99.999999% kill rate. Modular filter cartridge system. Includes one purist filter. Reduces a wide range of impurities. Triple insulation 40 oz bottle. 18/8 stainless steel. Smart hydration reminder. Spout design. Portless magnetic charger. TSA-friendly. Tested on e.coli in 3 mins. Metals, chemicals, micro-plastics.