I'll be honest, one of the things that drove me the craziest about owning a Keurig was the fact that I couldn't use some of my favorite coffee. Because it wasn't available in the k-cups. BUT, they went and solved my problem. This small addition to your keurig will allow you to use any coffee you want for your cups. It's just like filling up one of the larger coffee filters, only it's about 2-3 scoops to get it filled. Pop it in like your k-cups and you're done. This has made me an even bigger fan of my Keurig machine. I received this product free for testing purposes.