High Quality:The collapsible stainless steel cup is made of stainless steel, easy to clean, non-toxic, odorless, non-staining, durable, flexible and reusable, it will be crushed. It won't be broken, durable and easy to clean. This collapsible water cup is a must-have for travelers on the go. Foldable and Portable:This cup has a foldable, space-saving design and creative, convenient handling. Space saving and fits well in your pocket, purse, backpack, suitcase and doesn't take up space, ideal for outdoor hiking, camping, travel and sporting events. With Buckle:The foldable stainless steel cup is equipped with a buckle for easy carrying. An ideal accompaniment for travel. With a buckle, it takes up little space in your travel bag. Slip it on your belt loop, backpack or jacket. Package Included: 1 Collapsible Stainless Steel Travel Tumbler. This mug is perfect for your backpack, glove box, tool box, boat, etc. when you're on the go, this small stainless steel mug folds up, like a telescope, into a pocket on a key ring!