To use it, you start by filling the 12-ounce (359-ml) glass mug up to the lower fill line, with ground beans of your choice. You then add hot water to the upper fill line, then wait two or three minutes while the coffee steeps. Finally, you slide in the plastic filter cylinder, and gently push it down. A silicone gasket around the bottom edge of that cylinder meets against the inside of the mug, to keep the grounds from escaping up its sides.
Then, you drink the coffee.
The glass mug is dishwasher-safe, while the cylinder and gasket need to be hand-washed. It’s available now at ThinkGeek for US$24.99, and can be seen in use in the video below.