Dr. WaterR Steel Double Wall Mug is made of steel used for drinking tea/coffee and other beverages. The Inner & Outer Body is made of stainless steel, which is a type of steel that is resistant to corrosion and discoloration. Double Wall Steel Mugs are known for their durability and ability to retain heat, making them a popular choice for people who prefer their tea to stay hot for longer periods of time. These Mugs are made of double-wall construction, which helps to insulate the tea/coffee or other beverages and keep it hot even longer. They are often used in places where traditional ceramics or glass Mugs may be too fragile or impractical, such as on a camping trip or in a work environment. Steel tea Mugs are also sometimes preferred for their modern, sleek appearance and easy maintenance, as they can be easily cleaned and do not break or chip as ceramic Mugs can. Available in different colors to choose from. Select your favorite one ideal for personal use or gift it to your loved ones. Double Wall Body Outer Body Coated with attractive colors Handle for ease of handling Lid to make your beverages stay hot or cold for some time