Safe material. The food grade silicone collapsible travel mug. Guaranteed stainless steel rim and plastic cover. BPA free. FDA approved. Easy to wash. scentless. without spots. sustainable. flexible and reusable.Ultra-thin and portable folding design Update the foldable design. Saves space and only 0.59In when folded. fits easily in your pocket. handbag. bag of bones. suitcase and does not take up space. ideal for hiking. camping. outdoor travel and sporting events.Outstanding performance Can be hung from bag with connective hand cord and portable hook. Easy to read with the measurement inside the cup. Much easier to hold and drink from the stainless steel rim of the mug. Lid. well adjusted. keeps dust and dirt from getting in.Size information Capacity 9.22 oz (270 ml). When the cup is not folded. the greater diameter 3.74In. the lower diameter 1.77In & the height 3.35In. After having folded the cup. the height only 0.59In. -40F 480F temperature range. The low volume foldable and the lightweight made them both useful for home and outdoors.Why Choose Us Our premium product comes with a 30 day money back guarantee. 12 month quality guarantee and 24 hour prompt response. Please do not hesitate to contact us for your comments. we will be your side for all your services.