-This insulated tumbler makes the perfect gift, it has a detachable wireless speaker in the base for music. -The Dasoch tumbler has a 40oz capacity and it is perfect for everyday use. - It is the perfect size to fit in your cup holder. -This 40oz tumbler wit straw and detachable bluetooth speaker has a double vacuum wall design meaning it has great insulation. -Hot drinks can be kept warm for up to 6 hours and cold drinks kept cool for up to 11 hours. -40 oz Tumbler with Bluetooth Speaker- Tumbler with Handle! Sublimation, Stainless Steel, 40 Ounce, Detachable Speaker. -This insulated tumbler makes the perfect gift, it has a detachable wireless speaker in the base for your music. -This 40-ounce stainless steel double-walled travel mug with a handle and straw lid is leak-proof and BPA-free. - It can keep drinks cold for up to 12 hours and hot for up to 8 hours. 40 oz Tumbler with with Handle and Straw and detachable Bluetooth Speaker