Our coffee mug is made of food-grade 18/8 stainless steel, never rust, lead free, durable and easy wash. Double wall vacuum insulation design can keep your coffee or drinks hot for 3+ hours and cold for 9+ hours.the stainless steel coffee mug with handle is powder coated for additional texture and durability.12 OZ coffee mug with handle is lightweight and easy to carry, perfect for drinking coffee, beverages and tea in daily life and work. It is also a perfect travel coffee mug for camping.