Itechzhu Flip Top Sport Water Bottle BPA-Free Silicone Glass Leak Proof with Lock Outdoor Sports Gym Travel Home Gifts Made of BPA-free glass with superior impact resistance with durable silicone protection wrap outside, BPA-free glass safe and healthy, Glass is a great choice instead of plastic as it lowers the chance of toxic chemicals entering your body,silicone outside protect the bottle from breakage Flip Top solid and super water tight, special design with lock, the top cannot be clicked open with the lock on, no water leak upside down or in your bag, perfect for gym, hiking, camping, and outdoor trip Wide mouth, suitable to put ice cubes for water or drinks in hot summer, Suitable for both warm and cold beverages Sporty and fashionable design.Two sizes, 23 OZ/650ml and 17 OZ/480ml to choose from. it's safe carrying it by the cord Ergonomic strong strap, fit perfectly for hiking bag.Please notice that the strap is mainly designed for hand hold, not for long time hanging on such as baby strollers or rolling cheers.