2-Stage Integrated Filter Straw - Hollow fiber membrane filtration system filters out any harmful material larger than 0.01 diameter microns; activated carbon reduces chlorine odor and other tastes and improves the taste without batteries and other chemicals.

Lightweight and Portable -The mountop water filter bottle weighs only 0.46lb. Lightweight ergonomic design fits in all hands. Equipped with a comfortable carry loop large enough for 2 fingers. Well-balanced engineering so it doesn't easily tip over. Designed to fit in standard car cup holders.

Ultimate Travel Companion - Clean water wherever you travel. Say goodbye to single-use bottles. Drink water straight from the nearest stream, puddle, or pond. It's the fastest way to filter - never pump or wait for chemicals to react again.

2 Straws and 1 Carabiner - The mountop filtered water bottle comes along with 2 straws, one is the filter straw, the other one is a normal straw. The multi-function design provides you more choice and saves your money. You can use the filter straw in harsh outdoor, and you also can use it as your daily water bottle with the normal straw. The carabiner makes the mountop water filter bottle easy to clip to your backpack.

Safe Material - Leak-proof bottle made of BPA-free Tritan; hygienic, locking, push button lid with one-handed operation and integrated carrying loop; 22-ounce capacity.