Made of High quality food grade 304 stainless steel on inside wall and 201 stainless steel on outside wall, scratching resistance.Capacity: 550ml/18oz. Double-wall insulated, keeps beverage hot for up to 6 hours or cold for up to 12 hours.Durable stainless steel interior and exterior offers long lasting use.Fits most car cup holders as well as most single-serve brewers.Ideal for use in any lifestyle situation – office, outdoors, in the gym or at home. Measuring 2.91 * 7.68 inches, this custom 18oz thermos vacuum bottle. Usage Scenarios: Office supplies, school stationery, corporate promotions, trade show giveaways. Tailored branding: Supports logo imprint and design personalization. Product Highlights: BPA-free, leak-proof, travel-friendly.