Features: - Food Grade Silicone, BPA Free. - Soft bite valve, higher flow rate, wide mouth, easy drinking. - 2 stage water filtration with 0.01 Micron hollow fiber ultra filtration membrane, Removes 99.99% of Taste, Odors, Colors,Cadmium, Chlorine,but also, some Arsenic, Mercury, Iron, and Fluoride could be removed too. - The biggest feature about the collapsible water bottle is it can foldable after you drink out. Just need short time let the large water bottle to a mini water bottle. Save space and lightweight. It will more convenient for gym, bike, hiking, running, camping. - The water bottle made of food grade silicone that like baby nipple. The portable water bottle body is so soft and touched comfortable. - Each filter provides up to 1000 liters or 250 gallons of clean safe drinking water(Depends on water quality), great for outdoor recreation, hiking, camping, scouting, fishing,domestic and international travel and emergency preparedness kits or survival bags to constantly be prepared for when disaster strikes. Specifications: Material: TPU Capacity: 500ml Water Temperature: 0-40 Size: 255x75mm / 10x3 in Package Included: 1 X Water Bottle 1 X Filter Notes: 1. Manual measuring, please allow 1 ~ 3mm error, thank you. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the picture.