The safe material Collapsible cup is made from high quality food grade silicone material, free of BPA, FDA approved. The folding cup has a stainless steel rim and a sealed lid that provides security, odorless, non-polluting, durable, foldable, and reusable. .Portable and achievable after folding camping cup foldable design saves space, only 1.5 cm /0.59. Travel mugs can be hung from bags with hand straps and portable hooks. Perfect for your pocket, purse, backpack cross surgery gift that you can carry and use with you. .Excellent performance The foldable cup has a non-slip base that can be stably placed on the table. The scale on the inside of the cup is easy to read. The tight seal cover prevents any dust and dirt from entering. Much easier to hold and drink from the stainless steel rim. .The upcapacity of a properly sized folding egg is 6 ounces (200ml). Before folding, the top diameter is 3.74 inches (9.5 cm), the bottom diameter is 1.77 inches (4.5 cm), and the height is 3.35 inches (8.5 cm). When folded, the height is only 0.59 inches (1.5 cm). .The widely used foldable travel mug has an excellent design that fits perfectly in your pocket and is perfect for picnics, camping, road trips and outdoor hikes. It is also a good choice as a gift for relatives and friends. .