I have three, 1 cup, 3 cup and 9 cup. 1 cup is for me and my wife (we wait while the other finishes) 2 cup is for when we a guest 9 cup is for my 70 year old

I have three, 1 cup, 3 cup and 9 cup. 1 cup is for me and my wife (we wait while the other finishes) 2 cup is for when we a guest 9 cup is for my 70 year old parents. I cringe just seeing them drink 4.5 cups each.