Are you looking for something a little bit different? If so, these Bluetooth speaker cups might be just the thing. These unique double walled tumblers keep your drinks nice and cool in the Summer or hot in the winter months so they're the perfect accessory all year round. The have appx 17oz capacity and a removable bluetooth speaker at the base. It has an integrated LED flash which pulsates to the beat of the music. Its ideal for all occasions, camping, the beach, picnics, travelling and so much more.. The wide mouth opening is ideal for quick filling and can be used with a straw if you prefer.