Material sr. eco-friendlyThe collapsible travel mug made of food grade silicone. guaranteed stainless steel rim and plastic cover. BPA-free. FDA approved. Easy to wash. scentless. without stains. sustainable. flexible and reusable. Ultra-thin and portable folding design Update the folding design. saves space and only 0.59In when folding. slips easily into your pocket. handbag. bag of bones. suitcase and does not take up space. ideal for hiking. camping. outdoor travel and sporting events. Exceptional performance Can be hung from the bag with a connecting hand rope and a portable hook. Easy to read with the measurement inside the cup. Much easier to hold and drink from the stainless steel rim of the cup. Lid. well adjusted keeps dust and dirt out. Size Information Capacity 9.22 oz (270 ml). When the cup is not bent. the top diameter 3.74In. the bottom diameter 1.77In the height 3.35In. After folding the cup. the height only 0.59In. temperature range from -40F to 480F. The low foldable volume and light weight have both used them for home and outdoor use. Why choose us Our premium product comes with a 30 day money back guarantee. 12-month quality warranty and 24-hour prompt response. Do not hesitate to contact us for your comments. we will be by your side for all your services.