Note: There are some oil coating supplied by the manufacturer in the cup to ensure the quality and you can twist it smoothly.
*Latest Information*
The material quality and producing technology of this item has been upgraded for the 2nd time since January,2018 by our facotry.The new ABS plastic has been thickened and strengthened, which highly improved the products'ductility and safety and make the products present excellent performance in crack-resistance.
The apperance color of ABS plastic of the upgraded version seems to be whiter and clearer than former products,which is exactly the result of material improvement.
In addition, we will not increase price eventhough updated material and improved technology have increase the producing cost of the products.