Amazon offers the Keurig Original Donut Shop Regular Medium Extra Bold K-Cups 72-Pack for $27.99 $28.17. Check out via Subscribe & Save to cut it to $26.59 $26.76 and bag free shipping. That's $0.37/cup and the lowest price we could find for this quantity by $13.

Be sure to cancel Subscribe & Save after your order ships to avoid being billed for subsequent shipments.

Update: It's now available for Prime members only.