Features: Made from environmental friendly TPU material, BPA PVC free, odor Proof, safe without toxic, can rest assured use. Wide opening design, easy to fill water, ice cubes, different sports drinks and quite convenient to clean. Soft silicone nozzle provides fast water flow. Light weight and slim profile for a quick load into your hiking or camping backpack. 30 angle design, replenish water easily. Convex and concave part is added to the outer of the bottle cap to increase friction, saving strength. Durable and reusable,can use for times and just so light for carry.