This is truly the ultimate coffee mug! The mug is made of double wall vacuum insulated copper lined 18/8 stainless steel, which keeps your coffee hot for hours when used with the adjustable spill proof lid. The ceramic inner coating of the mug makes it easy to clean and further insulates the mug. The ergonomic rounded handle makes it easy and safe to grip and carry. Ideal for home and office use. Additional imprint is available on gift box (call for details).