The 40 oz. iCOOL Borrego Stainless Steel Travel Mug with Speaker is the perfect solution for keeping you hydrated while adding a touch of entertainment to your journey. The mug is made of premium 18/8 stainless steel and the double wall vacuum insulated construction keeps your drink cold for 30 hours and hot for 18 hours. The spill-resistant screw-on lid with a rotator closure ensures that your drinks stay contained, and the reusable straw provides comfortable sips for your cold drinks. This features a removable 3W light-up wireless speaker which connects to your device wirelessly for you to enjoy your favorite tunes wherever you go. BPA free and FDA compliant, it includes a Micro to USB-A charging cable to recharge the speaker's 500mAh lithium battery and comes in a white gift box. Playback time: 3-4 hours per charge. Output: 3W.