I had been trying to cut back on coffee drinking. I limited myself to two 12 ounce cups a day. But there were three times during the day that I wanted a caffeine boost.
I started drinking out of 8 ounce cups. I still am drinking 24 ounces of coffee, but I get it three times a day instead of two.
It is a habit to always order the larger size; but you would be surprised how many times the smaller size is just enough.