1、Large Capacity: This folding bottle has a large capacity of 500ml that can meet your water need. 2、Effective Filter Element: The filter element adopts 99.9% of ultra-high precision 0.01 micron hollow ultrafiltration membrane to remove harmful bacteria in water, can ensure the safety of your drinking water. 3、Lightweight, Portable and Folded: The soft water bottle with water purification features a high degree of flexibility, can be easily placed anywhere, more convenient to insert it the backpack or pocket, easy to carry. 4、Reusable Filter: Filter core is removable and flushing to achieve environmental reuse, you can wash the filter element that can keep clean. 5、Pure Physical Filtration: No chemical, give you more security. 6、Medical-grade Silica Gel and TPU Material: Soft and durable. Features: Large Capacity: This folding bottle has a large capacity of 500ml that can meet your water need. Effective Filter : The filter adopts of ultra-high precision 0.01 micron hollow ultrafiltration membrane to remove 99.9% harmful bacteria in water, can ensure the safety of your drinking water. Lightweight, Portable and Folded: The soft water bottle with water purification features a high degree of flexibility, can be easily placed anywhere, more convenient to insert it the backpack or pocket, easy to carry. Reusable Filter: Filter core is removable and flushing to achieve environmental reuse, you can wash the filter that can keep clean. Pure Physical Filtration: No chemical, give you more security. Silica Gel and TPU Material: Soft and durable. Specifications: Bottle Material: 0.3mm/0.01in TPU Filter Material: Carbon Fiber+PP Cotton+Ultrafiltration Membrane+ABS Capacity: 500ML Color: Blue Water Temperature: Below 50 degrees Celsius Water Outlet Way: Light press after bite Filter Length: 72mm/2.83in Filter Diameter: 18mm/0.71 Clean Water of Filter : 0.5t/1102lb (Increase use time by anti-cleaning method) Item Size: 255*95mm/10*3.7in Item Weight: 44.7g/1.58oz Package Size: 310*120mm/12.20*4.72in Package List: 1 * Folding Drinking Water Bottle 1 * Folding Drinking Water Bottle