The best purchase I made was for a Keurig and a coffee maker that done both made K-cups and Coffee grinds.
This was great purchase because I bought the K-cups for regular coffee like you can put your own coffee grinds in them but I misplaced them when my other k-cup machine went out and I bout filters for my other pot but it went out also so I just decided to buy one that does both and it was worth it.
You basically can tell the pot what to make by pushing a button on the side to tell what kind of coffee is being made whether it is ice coffee or regular coffee. In which I love because I enjoy frappes and this helps with it making it not to hot that it melts the ice.