Amazon offers 6 Tim Hortons Single Serve Cup 12-Packa for Keurig K-Cup Brewers (72 K-Cups total) in Regular flavor for $39.99. Use the clippable coupon on the page to cut it to $33.99. Then cut it to $31.99 and bag free shipping when you checkout via Subscribe & Save. That's $0.44 per cup and the lowest total price we could find for this quantity.
Be sure to cancel your subscription once your order ships to avoid being billed for further shipments.