The JaminSS is a matte black double wall stainless steel 12oz bluetooth speaker bottle. The double wall vacuum tumbler has 18/8 stainless construction with a copper lining. Double wall construction allows you to enjoy your hot or cold beverage for up to 6 hours. Drink your favorite beverage and listen to your music on the go! Micro-USB port for fast and easy charging and a convenient carry handle. Wide mouth opening to easily add ice and clean. USB cord included. Handwash recommended only.