The coffee mug made of food grade stainless steel(304), with double vacuum insulation function, can effectively keep the temperature of the drink up to 8 hours, it keep drink hot in winter and keep drink cold in summer. Comparing with the glass cup and ceramic cup, this stainless steel coffee mug is more durable, easier to clear, not easy to break.You can also imprint what you want on the body of the mug.More information, please send your detailed request for quotation. Measuring 2.75*5.9 inches, this custom 12oz stainless steel coffee mug. 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.