Features: 1.Materials: Made of food-grade silicone, these collapsible mugs have a capacity of 320ml and are sturdy, reusable and convenient as they don't take up much space in your bag when folded. 2. Ultra-thin foldable design: The updated foldable design can be fixed in your backpack or suitcase without taking up space, perfect for outdoor hiking. 3. Ergonomic Design: The cups are narrow in the middle and wide at the ends for more stability when on a flat surface so it won't collapse or tip over. 4. Widespread use: This slim and space-saving collapsible mug comes with a tight-fitting lid to keep dust away from your mug. This drinking mug set is perfect for outdoor hiking on camping trips and sports activities. 5. After-sales service: If you have any problems, please contact us immediately and we will help you solve it as soon as possible. Specifications: Material: Silicone+stainless steel Size before folding: 10.5*8.1cm Size after folding: 8.5*2.5cm Capacity: 320ml Notice: 1.Actual color may be slightly different from the picture due to of the light effect. 2.Please allow 1-3cm deviation due to manual measurement. includes: 1 * Expandable Collapsible Cup 1 * Lid