Amazon offers the Ekobrew Stainless Steel Elite Refillable K-Cup for $12.45. Clip the 20% off coupon on the product page to drop the price to $9.96. Plus, Prime members bag free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $6.68.) That's $1 under our January mention and the lowest total price we've seen. (It's a current best by $7.) It's not compatible with the B30, B130, B150, B155, Mr Coffee BVMC-K, Vue or Keurig 2.0.