Named 'Invention of the Year' by Time Magazine, LifeStraw contains no chemicals, no batteries, and no moving parts. With it's high flow rate, it is perfect for drinking your co-worker's urine. With feedback from the users of the first generation, LifeStraw has redesigned the device with discretion in mind and brought the filter down to a mere two ounces. No need to lie to your boss saying you were "practicing for a camping trip" or that you "couldn't find the water fountain" ... the LifeStaw has your back.