I buy the cups in bulk at Amazon. Also now is a good time to watch for holiday special buys online and stock up on the K cups. I never buy the K cups at the grocery store. Sears just had a special, K cups of Green Mountain coffee 196 cups for $59.29. My Keurig came with a refillable cup and I use that with regular ground coffee. The Keurig refillable cup seems to work better then the other refillable cups. Walmart has them.