The inside of the bottle is made of 304 stainless steel, while the outside is made of 201 stainless steel. It will keep your favorite drink hot or cold for 8 to 10 hours. Add your organizational or corporate logo to this product to create a great giveaway or premium for big events. Whether it’s for a new employee or another holiday memento, this product will be a hit. Measuring 12:oz, this custom stainless steel double wall vacuum bottle 12oz 17oz. Usage Scenarios: Office supplies, school stationery, corporate promotions, trade show giveaways. Customization available: Print your logo or customize packaging and color schemes. Product Highlights: BPA-free, leak-proof, travel-friendly.