Ingenious method to prepare loose-leaf tea without getting any leaves or pieces in your cup! With this unique, patented mechanism, you brew the leaves (or, frankly, the coffee beans or the chocolate powder!) with the hot water (or milk) in the BrewT, then when steeping is complete, you set the BrewT on the cup or mug rim, the valve opens and dispenses the beverage into your cup. When you lift the BrewT off the rim, the flow of liquid ceases. You dump the leaves, clean out your BrewT, and it's ready for the next steeping. Meanwhile, you have a delicious hot cuppa with no leaf pieces! Happy sipping!