The collapsible travel cups are made of 100% food grade silicone material, odorless, non-staining, durable, flexible & reusable. and easy to clean. Using a collapsible design, this folding camping cup is so lightweight and portable, equipped with Carabiner that fits well in your pocket, purse, and backpack. Increased capacity to reach 6oz/180ml, collapsed only 0.78in/2cm high. Ultra-thin and space saving, this drinking Cup set is perfect for outdoor hiking, camping, travel, and sports events. Temperature rated -40 degrees F to 446 degrees F. Suitable for cold drinks, tea, coffee, and other hot beverages. Dishwasher Safe.