Made of food-grade platinum silicone and BPA free. Healthy than the plastic bottles, reusable, no stinky odors or bad tastes. Safe for a wide range of temperature: -40°F-30°F. But we do not recommend using the bottle for liquid temperatures higher than 140°F to avoid scalding your hand while holding it. Water bottle is soft and durable, unlike the glass water bottle, which is easily broken. It is designed for outdoor sports, like running, cycling, travel, hiking or indoor gym. Especially with the added gear-carabineer provide much convenience for these activities Collapsible design, 60% volume reduction after folded, only 5.12”(height) left can be adjusted to small or large to meet your needs. Hook design make the bottle easy to carry or attached to your backpack. Light but sturdy, easy to pack for travelling. The foldable bottle is built in silicone sealing ring, two way screw lid, and the cap also has the sealing ring to prevent water spilling. Wide-neck detachable design makes the bottle easy to clean the interior, put ice and lemon inside