Made of food-grade platinum silicone, it is 100% FDA-approved and BPA-free. Healthy than the plastic bottles; reusable; no stinky odors or bad tastes. Safe for a wide range of temperatures: -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. Large capacity and light weight: The collapsible water bottle weighs only 200 grams, can hold 500 ml of liquid, and is convenient to carry. It can be folded to a third of the size after drinking, which saves a lot of space. It is very suitable for boys, girls, boys, women, and men. Collapsible design, 60% volume reduction after folding, only 5.12(height) left can be adjusted to small or large to meet your needs. The hook design makes the bottle easy to carry or attach to your backpack. Light but sturdy, easy to pack for travel. The foldable bottle is built with a silicone sealing ring and a two-way screw lid, and the cap also has a sealing ring to prevent water from spilling. The wide-neck detachable design makes it easy to clean the interior and put ice and lemon inside. The best return gifts for kids.