SPECS: Food safe 18/8 Stainless steel material 18 oz. 3.7W speaker with 1000 mAh battery DESIGN AND DETAILS: The Fireside Outdoor VIBE Tumbler features a removeable, integrated Bluetooth speaker so you can stay hydrated while listening to your favorite music The speaker features a steel mesh cage and a IPx6 water resistance rating showcasing its durable mindset Designed to keep your drink of choice cold for up to 8 hours while also keeping your songs/podcasts playing for up to 6 hours Despite its size, the 3.7W speaker crisply produces all the sounds and beats you would expect from a Hi-fidelity speaker As you drink, play the speaker to feel the beat subtly reverberate through the cup or detach the speaker and enjoy the music wherever your heart desires Designed to fit into any standard car cupholder The speaker, tumbler, and slide track on the lid are all powder coated in the same color of your choice providing a sleek design throughout JustVIBE technology lets the four LED lights on the speaker dance along with you as the music plays Speaker screws on and off the bottom of tumbler