The Grayl Water Filtration Cup is an innovative water filter that removes 99.99% of waterborne bacteria while reducing chemicals and metals that affect the taste of water (tested according to NSF/ANSI standards 42 + 53). The Grayl system is straightforward: simply fill the outer cup with available water and push the inner cup down into the outer cup. This forces water through the filter and into the inner cup, where it can be sipped as desired. The included G3+ filter has a lifespan of up to 300 uses (40 gallons).
Stylish and cleanly designed, Grayl Filtration Cups are available in several color combinations and fit in comfortably, whether you're in the office, on the road or in the backcountry. Grayl filters are BPA free and are constructed of 18/8 stainless steel. The removable, drink-through lid allows you to sip at will. Grayl filters fit in most cup holders.
For additional protection, Grayl Filtration Cups can be upgraded with a G3+ Purifier Cartridge thats removes 99.99% of viruses and cysts in addition to bacteria, protozoa and reducing metals and chemicals.