Health Materials: The collapsible travel cup made of food grades silicone, offered stainless steel rim and plastic lid. Easy to wash, odorless, non-staining, durable, flexible & reusable. Ultrathin Folding Design and Portable: Update the collapsible design, space saving and only 0.59In when collapsed, fits well in your pocket, purse, backpack, suitcase and takes up no space, ideal for outdoor hiking, camping, travel, and sport events Outstanding Performance: Can be hung on the bag of a connective hand rope and portable hook. - Easy to read with the measuring inside of the cup. - Much easier to hold and drink from the stainless steel rim of the cup. - Tight fitting the lid prevents any dust and dirt to get close. Size Information: The capacity 600ml. Before folding, measure 24*8.2*4.8cm. After folding, the Height only6.5cm, temperature range from -50-200. The small collapsible volume and light weight made them both of these use for home and outdoors.