Stainless Steel Double Walled Mugs, 13.5oz / 400ml Mug. Unbreakable, Insulated, Dishwasher Safe with Eco-friendly Gift Packaging. High Quality Stainless Steel, Will Last for Years. Specifications: - Material: 100% 304 (18/8) food grade stainless steel - Dimension: Diameter: 3.2 inch (8.2cm); Height: 4.1 inch (10.5cm). - Weight: 6.3 oz (180g/1 pcs)..