1. QUALITY & DURABILITY: This vacuum coffee mug is made of 18/8 premium stainless steel (inside and outside), with a food-grade polypropylene (PP) lid. It is BPA-free, environmentally friendly, and durable for everyday use. 2. STYLISH DESIGN: Compact and lightweight, it fits most cup holders. The silicone textured surface band makes the mug easy to grip. The non-slip base helps prevent the coffee mug from slipping or tipping over. The wide opening makes it easy to clean and add ice cubes, and it is not prone to bacteria breeding. 3. Leak-proof lid: The silicone sealing ring on the lid provides a good leak-proof seal. It opens through a small hole for easy drinking. One-button operation helps prevent accidental leakage or spillage. 4. LONG-LASTING HEAT AND COLD RETAINING: Double-wall construction helps with temperature retention, keeping your drink hot/iced for hours. Pour hot or iced coffee into the vacuum coffee mug to feel energized throughout the day. 5. GREAT GIFTS: This reusable coffee mug can be given to loved ones, friends, and family as a nice gift for birthdays, Thanksgiving, Christmas, Valentine's Day.