Product Description1. FILTRATION SYSTEM: This water bottle is designed with a F3-pressureless ultra filter which could filter odor, Impurities, pollutants in water, provide you much healthier water to drink in outdoor.2. HEALTHY & DURABLE: Made of silicone and PP, certified material with no harmful toxins, this safe and eco-friendly. Shatter-proof silicone body make it soft but durable, won't break by falling down.3. PERFECT FOR OUTDOOR ACTIVIES - The biggest feature about the collapsible water bottle is it is foldable after you drink out. Just need short time let the large water bottle to a mini water bottle, it is pocket bottle, save space and lightweight. It will more convenient for gym, bike, hiking, running, camping.4. LEAKPROOF: Triple leak proof with silicone, one dust-proof cover which is better than normal bottle and help you to protect from leak and dust.5. WASHABLE & REUSABLE: Dishwasher safe on the top dishwasher rack. Easy to wash by hand as well.SpecificationCapacity: 750 ml / 26 fl ozWeight: 180 g / 5.8 ozSize: L 3.5" x W 3.5" x H 11.5"(can be folded down to 4" in height)Material: Food-grade silicone + food-grade PPFilter Size: 40x40x84mm(1.57"x1.57"x3.3")Filter Material: PP and 0.2 micron hollow fiber membrane yarnPP Part Temp Range: -40(-40) - 230(110) Silicone Part Temp Range: -22 (-30) ~ 392 (200)