STAYS COLD: THERMOS vacuum insulation technology for temperature retention of cold beverages. Perfect sidekick for wherever the day takes you, keeping beverages cold for 18 hours. Not for hot liquids | EXTREMELY DURABLE: High quality 18/8 stainless steel construction is dependable any time of year for morning errands or workouts. Dishwasher safe (top rack) | LEAK-PROOF LID: The push button lid is leak-proof when closed. Equipped with a built-in lockable cap that hygienically covers the spout | HYDRATION INTAKE METER: To reach your hydration goals for the day, the hydration intake meter helps you track how many bottles you drink each day | CUP HOLDER COMPATIBLE: Fits most car cup holders so you can drink your favorite cold beverages wherever the day takes you | TRUSTED BRAND: For over a century, THERMOS brand products have been making everyday life better, every time. Hot stays hot. Cold stays cold. Food and drinks stay fresh. The little things go a long way, so do we