1、Made of high quality material, BPA free, safe, odorless, durable to use. 2、With 2 stage integrated filter straw, removes bacteria and protozoa from lakes, streams to ensure safe and clean drinking water. 3、Each hollow membrane filter can purifies up to 1500 liters of contaminated water, can remove almost 99% of waterborne bacteria, chemicals. 4、Lightweight, convenient to carry and storage. 5、Suitable for hiking, traveling, backpacking, camping, etc. Features: 1.Made of high quality material, BPA free, safe, odorless, durable to use. 2.With 2 stage integrated filter straw, removes bacteria and protozoa from lakes, streams to ensure safe and clean drinking water. 3.Each hollow membrane filter can purifies up to 1500 liters of contaminated water, can remove almost 99% of waterborne bacteria, chemicals. 4.Lightweight, convenient to carry and storage. 5.Suitable for hiking, traveling, backpacking, camping, etc. Specifications: Material: Tritan Weight: Approx. 285-287g Optional Color: Blue, Black Size: Approx. 80*230mm/ 3.1* 9.1in Capacity: 650 ml Filtering capacity: 1500L Filter material: Ultrafiltration membrane, activated carbon, silver nanoparticles Packing List: 1*Water Filter Bottle