Come and Check Our Promo Solutions.The vacuum mug is made of highly durable 18/8 stainless steel which has a higher corrosion and oxidation resistance than regular steel can prevent odor and easy to clean. BPA-Free. Drink hole on the top for easy sipping. Super robust, double wall vacuum with copper lining for maximum insulation. Ensure your drink stays cold or hot for 18 and 6 hours respectively. Perfect for multiple application, indoor & outdoor. Pls check inventory and detailed info with us before placing your orders.