Take the trouble of carrying a bulky coffee mug away from your trips & outings. This cup is made from durable food grade silicone can be collapsed down to the size of a two-inch disc & fits even in your pocket. Simply unfold the body & fill your favorite beverage for use. The solid thermal heat sleeve slots neatly into the lid when not in use & has a swivel plug to fit snugly over the drinking hole to prevent leaks.