When I buy coffee, I tend to go for what's on sale among the premium brands, like Starbucks and Peet's. Recently at Target, I found a pleasant surprise on my Starbucks coffee bag that was already on sale: "Tall brewed coffee FREE with purchase."
Basically, you can exchange the empty bag for a free tall coffee at Starbucks when you're done with it. The offer is limited to one per person and expires one month after the "Best Before" date. Mine is stamped for May, so the coupon will last through June. The bag must have the coupon (pictured) to be used for this offer. Happy hunting!