Amazon offers the Ekobrew Stainless Steel Elite Refillable K-Cup for $13.39. Clip the 20% off coupon on the product page to drop the price to $10.71. Plus, Prime members bag free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $6.68.) That's the lowest price we could find by $2. It's not compatible with the B30, B130, B150, B155, Mr Coffee BVMC-K, Vue or Keurig 2.0.