The inside of the bottle is made of 304 stainless steel while the outside is made of 201 stainless steel. It keeps your favorite beverage hot or cold for 8 to 10 hours. Add your organization or company logo to this product to create a stunning giveaway or giveaway for a big event. Whether gifting for a new employee or other holiday keepsake, this piece will be a hit. Measuring 16 oz, this custom 16 oz. stainless steel vacuum bottle travel coffee bottle. Usage Scenarios: Office supplies, school stationery, corporate promotions, trade show giveaways. We offer logo printing and full packaging customization. Product Highlights: BPA-free, leak-proof, travel-friendly.