The Clever Coffee Dripper has advanced the concept even further creating an easy way to brew without bitterness, acidity or loose grounds. The difference is it’s new shut-off valve system. Instead of pushing the grounds to the bottom of the brew carafe, the grounds settle naturally. Advanced in 3 ways 1. No need to worry about brewing temperature dropping quickly as it drips into the cup. 2. Water can be poured over the grounds all at one time. No need to pour the slowly to pre-moisten the coffee. 3. The Clever Coffee Dripper features a shut-off valve design which holds the coffee until the entire brewing process is complete and the brewer is placed on the cup opening the valve.