1. Foodgrade silicone: Made from foodsafe silicone material, our square folding cup ensures the safety of your drinking water. Choose a healthy option and enjoy beverages at any temperature with its heatresistant and coldresistant properties. Switch to a reusable and safe alternative. 2. Foldable design: Our square water cup features a unique folding function, allowing you to compress it to half its original size effortlessly. Whether for backpacks, purses, or totes, this tumbler is the portable companion, saving valuable space for outdoor adventures. 3. Capacity: With a generous 600ml capacity, our square foldable water cup keeps you hydrated all day. Its compact and lightweight design makes it ideal for any adventure, whether hiking in the wilderness or exploring the city. 4. Powerful Sealability: Enjoy leakproof hydration outdoors thanks to the secure seal design of our square collapsible water cup. Carry it in your bag or car cup holder with confidence—the locking lid ensures no spills when closed.