The Narwhal 20 oz Speaker Lid is the perfect addition to your favorite tumbler. Enjoy your favorite beverage to the sound of your favorite song with this innovative lid. It connects to your phone, tablet or music-playing device through Bluetooth 5.0 technology that will last for up to 6 hours on a single charge and can be connected to a second Narwhal Speaker Lid for stereo sound. This lid fits most 20 oz tumblers with a 3.5" top like YETI, Hydro Flask and more. Enjoy a cold drink, listen to your favorite music and relax with the Narwhal 20 oz Speaker Lid!