I found the worst K-Cup coffee

Guy Fieri Redwood Roast

Guy should stick to what he knows best ““ flavorful food. Here, a flat, cardboardy flavor coupled with a bitter finish make this a rough, stale-tasting sip. Modification required for some Keurig machines. $12.99 for 18 at Office Depot. (½ a star)

Donut Shop

Rewarmed, day-old coffee would taste better than this wicked cup of burned, bitter java. Modification required for some Keurig machines. $9.49 for 16 at Target. (No stars)