Add 1/2 lb. strong ground coffee to 1 gallon cold filtered water. Depending on how finely ground the coffee is, 1/2 lb. is approximately equal to 2 3/4c. Mix until the coffee grounds all have contact with the water.
Cover and leave on the counter overnight at least, and up to 20 hours.
Strain through cheese cloth in a strainer or a nut bag in a strainer. Keep concentrated iced coffee in refrigerator for a couple weeks — if it lasts that long!
Serve with lots of ice, a splash of cream and liquid stevia. Alternately, you can purchase the syrups from Starbucks. Make sure to ask them for a pump!