We want to convert the 3 cups into ounces so we can work with it. 3 cup x 8 ounces per cup = 24 ounces. Now we want to subtract 24 from 40. 40-24= 16. We now want to convert pint into ounces. 1 pint= 2 cups= 16 ounces per pint. 16 ounces of iced tea/16 ounces in a pint equals 1 full pint.