12oz Stainless Steel Tumbler, Double Wall Vacuum, Sliding Spill-Proof Lid, Cup for Hot and Cold Liquids. Straw Included. * Double walled vacuum insulation * Enjoy your favorite drink with this insulated slim tumbler cup all year round. * VACUUM INSULATION: With the technology of double walled vacuum insulation, the stainless steel travel tumbler can keep your beverages hot for 5 hours and keep cold for 9 hours, enjoy your favorite drink with this insulated slim water tumbler all year round. * HIGH-QUALITY MATERIAL: These insulated travel tumblers are high-quality and food-grade stainless steel, which is durable, light weight, lead free, unbreakable and easy to clean.