Used once or twice. Tested both sides and works.

The Keurig K-Duo Essentials Coffee Maker in Black is a versatile coffee maker that offers both single serve and 12-cup carafe capabilities. With a 60 oz water tank capacity and a power source of electricity, this coffee maker brews coffee using pod capsules and features a quick heat-up time of 20-25 seconds. The machine is made of durable plastic with a sleek black color and comes with useful features like a removable drip tray, auto shut-off, and a pause-and-serve function. The Keurig K-Duo is a reliable choice for coffee enthusiasts looking for convenience and efficiency in their coffee brewing experience.