The inner wall is made of 304 grade food grade stainless steel and the outer case is made of high quality 304 stainless steel.They also have the silicone bottom which is designed to prevent them from sliding and spilling. Other parts of these Travel mugs are made of BPA-free PP materials ,food grade contact silica gels and 100% Co-polyester plastic that make them Safe and Healthy to use.
The inside of the lid is embedded with PP leak-proof silicone ring. Simple structure, washable with a spout removed,The cup mouth is smooth, it will not cut lips, the cup has large diameter, It has detachable filter net, can filter the residue such as tea. The bottom of the cup is made of non-slip material, which is not easy to slip off and is durable.
