one of the groupon products is refillable 'pods' for your k-cup type machine
I'm assuming sarcasm here:
Overview
EkoBrew single-cup brewing packs cut down on the waste associated with single-brew coffee systems and allow coffee connoisseurs the freedom to brew with beans of their choosing. The spacious filter houses all the grounds necessary for a mild or dark cup, and a low-tamp dispersion cone evenly soaks grounds for maximum extraction. The filter stands up to daily use thanks to a durable plastic frame and a heavy-gauge micro-mesh filter. After brewing, the filter washes clean, allowing it to be repurposed as a crib for a baby hummingbird.