Groupon is featuring EkoBrew Reusable Single-Cup Packs up to 48% off. Plus, they ship free. There are three options: 1) a single pack for $9 ($11.49 plus shipping on Amazon), 2) a two-pack for $16 ($20 plus shipping is the next-best price we found), or 3) a 3-pack for $22. These single serves replace k-cups so you reduce waste and always use your favorite flavor. There is a limit of two per person but you can buy three additional as gifts. Groupon does not charge sales tax.