Health Materials: The collapsible travel cup made of food grades silicone, guaranteed stainless steel rim and plastic lid, BPA Free, FDA Approved. 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 9.22oz(270ml). Before folding, the Top diameter 3.74In, Bottom diameter 1.77In & Height 3.35In. After folding, the Height only 0.59In, temperature range from -40F to 480F. The small collapsible volume and light weight made them both of these use for home and outdoors.