About this project QUALITY AND DURABILITY: This vacuum coffee mug is made of durable 18/8 premium stainless steel interior and exterior with a food grade pp lid. It is 100% BPA free, eco-friendly and durable enough for everyday use. Stylish Design: Small and lightweight, it fits most cup holders. The silicone textured band on the surface makes this mug easy to grip and the non-slip base prevents the coffee mug from slipping or tipping over. The large opening makes it easy to clean and add ice while preventing bacterial growth. Leak-proof lid: The silicone sealing ring on the lid ensures good leak-proof performance, and has a small hole for easy drinking. One-touch operation effectively prevents any accidental leaks or spills. Capacity: 510ml Long time cold and warm: Double wall construction maximizes temperature retention, keeping hot/ice drinks for hours. Pour hot or iced coffee into a vacuum insulated coffee mug to keep you energized throughout the day. GREAT GIFT: This reusable coffee mug is a great gift for your loved ones, friends and family on your birthday, Thanksgiving, Christmas, Valentine's Day.