Come and see our amazing products. The grey transparent plastic sliding lid with a rubber gasket, which is well tightness. It is easily swiped to open while keeping away from splashing. Closing the sliding lid keeps clean when do not use the mug. There is drinking hole on the top.The coffee mug is made of food-grade stainless steel, liner of coffee mug will not produce any taste and will not rust, hand wash is recommended. The structure of the coffee mug body is sturdy, could be used for a long period of time. Pls confirm with us about the packing info, stock color and exact production time before placing your order.