99 Ranch sells all varieties of Berkeley milk for $3.79 per gallon.
I can taste the difference between different brands of ice cream and yogurt, but milk is pretty much milk to me. So, one gallon of homogenized milk for $3.79 at 99 Ranch or two gallons for $3.99 at Costco? Even if you cannot finish a gallon in a week, two gallons at Costco seems to be the way to go.