AeroPress Flow Control Filter Cap - StandardCreate hundreds of uniquely delicious recipes with the AeroPress Flow Control Filter Cap. This innovative accessory uses a pressure actuated valve to eliminate drip through and maximize control over the brew process, allowing you to experiment with any grind size or brew time. Stops drip through to give you full control over the brewing process for greater recipe creativity Lets you try any grind of coffee or any length of brew time to personalize