Made of polyester material,sturdy and durable,the rotating lid has a good seal,and the large opening is convenient for adding water and ice cubes.It can be used for cold compress or hot compress,physical cooling,suitable for sports and fitness exercises to relax muscles after injury,and can also provide food Refrigeration and preservation function.Rush service and Unprinting service is acceptable.Price above 1100pcs is via Ocean freight.We have 6'',9'',12'' sizes.