1. Compatibility - Reusable K-cups are only available for Keurig K Supreme and Keurig K Supreme Plus coffee models. Please remove the original adapter before use, this adapter is only suitable for this metal K-cup, not for single cup coffee pods and other reusable K-cups. 2. Design science - The reusable K-cup uses a one-piece design, the top is tightly sealed to prevent coffee from spilling during use, and the bottom and side walls have 360-degree perforations to optimize coffee extraction and brew delicious coffee, and the reusable K-cup filter is very useful for coffee lovers. 3. Eco-friendly - Keurig's reusable K-cups are made of stainless steel. Paper filters need to cut down more than 1 million trees every year, and discarded plastic coffee capsules don't break down easily! To protect the environment, use reusable stainless steel K-cups. 4. Stainless steel cup, fully retain the natural oil and flavor of coffee. Use stainless steel K-cups to brew coffee, keep the original flavor of coffee, and you will taste the best coffee you have ever had! Dishwasher safe. 5. Save money - The Keurig Supreme K-Cup is reusable and easy to clean. When the coffee grounds are ready, pour them into the trash can and rinse them with water.