How Big Is 20 Fl Oz?

How Big Is 20 Fl Oz? 20 fl. oz. is equivalent to 2.5 cups. To convert fluid ounces to cups, you need to know that there are 8 fluid ounces in one customary cup. How big is a 20 ounce container? BPA Free Food Grade Round Container Dimensions: Container dimensions: 4.61′′ diameter x 2.9′′ height.