We use a Keurig coffee maker at home. In an effort to be more green, we use our own ground coffee in a reusable filter K-cup. I, however, had a problem with being able to effectively load the filter cup from the bag of ground coffee without making a mess. I also wanted a way to tamp the grounds into the filter cup to force a stronger brew. So I came up with this little beauty. The cup volume is approximately 25 milliliters. I use it by adding about 3/4 of a scoop to the cup, tamping it, then adding another 3/4 scoop and then tamping it again. Printed in PLA on a MakerBot Replicator 2 2 shells 10% infill With supports The Sketchup file is included, so feel free to remix.