Take Blackstone with you everywhere you go with the Blackstone Insulated 20 oz. Tumbler in Black. This mug is double wall vacuum-insulated to keep your cold beverages cold and your hot beverages hot. The Blackstone-branded mug is made of stainless steel and features a classic powder-coated black finish. And in case you drop it (we know it happens) we ve got you covered with an impact-resistant plastic lid. The perfect gift for someone you love or a nice reward for yourself. Show off your love for Blackstone with this insulated mug.