Design your own 20 oz stainless steel tumbler with built-in Bluetooth speaker! This functional, no spill, double wall skinny tumbler comes with a metal straw and cleaning brush, and it can be personalized with sublimation or vinyl. Customize with a brand logo or personalize with a name to create a one-of-a-kind tumbler. Not only does the LED light power on the speaker and adjust volume, but flashes as you play music for an added layer of fun! Play the Bluetooth speaker while connected to the included USB charging cable, or use it unplugged with up to two hour playing time. Speaker fully charges in two hours and has a Bluetooth range of up to 50ft from the connected device. Includes instructions, USB cable and pairs easily with a Bluetooth-capable device. This speaker is water-resistant but cannot be fully submerged in water. Not dishwasher safe.