Net1Distributing via Amazon offers Prime members the EkoBrew Refillable K-Cup for Keurig Brewers 2-Pack in Brown/Green for $7 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $6.64.) That's $3 below our October mention of a 2-pack, the lowest total price we could find for this quantity by $7, and the best per unit price we've seen. (We saw a single cup for $4.37 last week.) These BPA-free plastic coffee filters feature heat-resistant side-mount grips and silicone O-rings.