The founder of Grayl, Nancie Weston was so determined to create a beautifully designed all-in-one filtration/drinking cup, that even after being told by twelve engineers her idea would not work, she mortgaged her home and started the business.
The cup is made of food grade silicone and durable,18/8 stainless steel. The advanced G3+ filtration technology combines fast flow with an unrivaled ability to grab microscopic particulates. Each refillable cartridge is good for up to 300 filtered drinks. and keeps you safely hydrated about town or on international travels.