Mercuryes 400ml Stainless Steel Ml Insulated Mug is the perfect mug for drinking beverages on the go. The mug has a double insulated wall, keeping drinks warm for a long time. The twist on thumb slide lid makes it easy to drink up to ml of beverages. Moreover, the handle with the ergonomic thumb rest ensures a good grip. The Mercuryes 400ml Stainless Steel Ml Insulated Mug mug consists of stainless steel and black plastic, making it very strong, corrosion resistant, and easy to clean.