WalMart has little refillable cups that you can use easily without removing the part you have to remove from the Keurig to use their refillable cup. They come in packs of four and we just love them. Their cap is attached so you can't lose it, and all you need to do is put in a scoop of your favorite coffee and pop it in place. Hate the one we bought from Keurig for $16 that does require pulling out the piece that holds the cup. The premade cups are great, but really expensive even when you buy direct. Not to mention the enormous pile of plastic debris left from the disposable ones.