The Bullet Bluff 400ML has a versatile two-in-one design that doubles as both a tumbler and a drink insulator. It features double-wall construction with copper vacuum insulation to keep your beverages hot for up to 5 hours or cold for up to 15 hours. This item comes with a clear, screw-on, spill-proof lid that has a secure flap-seal closure. The Bullet Bluff Vacuum Tumbler and Cooler 400ML is hand-wash only and fits most standard car cup holders. Plus, it has a fine-grit coating that gives it a pleasant, natural texture. Colours: Black and White. Sizes: 143mm(w) x 82mm. Features: 2-in-1 design doubles as a cooler or tumbler, Copper vacuum insulation keeps beverages cold for up to 15 hours or hot for up to 5 hours, Rugged double-wall construction for durability, Includes screw-on, spill-proof lid with flap closure, Compatible with most standard car cup holders, Fine-grit coating provides a natural feel, Hand-wash only, Can be rotary printed. Packaging: Bulk. Materials: 18/8 Grade Stainless Steel inner wall with Stainless Steel Outer