Food grade silicone maintains water safety while you drink. The square folding cup is heat resistant and cold resistant, allowing use with hot or cold beverages. Reusable and durable, it provides a safe alternative to disposables. Space saving design. With a unique folding function, it compresses to half its size for easy packing. Great for backpacks, bags, and car cup holders. Take it anywhere with its portable foldable design. Large capacity you can trust. The 20 oz (about 590 ml) square collapsible cup delivers ample hydration without adding bulk. The design stays space efficient while you drink enough outdoors. Reliable sealability. The leak proof seal and locking lid prevent spills when closed, making it suitable to carry in a bag or car cup holder without worry. Use scenarios. Ideal for hiking or camping where space and weight matter; convenient for daily commute or office use with limited desk space; useful on road trips or in gym bags for reliable hydration on the go.