Made of food grade silicone. BPA free, non-toxic. Features with PP lid and heating sleeve, easy to clean. It can be hung on the bag using a connective hand rope and a portable hook. Much easier to hold and drink from the stainless steel rim of the cup. Extremely heat and cold resistant, suitable for cold drinks, tea, coffee and hot drinks. Dishwasher and freezer safe. 7.28″H x 3.78″D