Through tomorrow 9/3 CVS is offering a gallon of milk for $1.99. But it gets even better because when you buy 1 gallon of milk you get back $1 in extrabucks reward. Making a gallon of milk after reward just $0.99. Keep in mind that prices, sales, milk brand may vary by store or region. Below is how I was able to score 1 gallon of milk for just $0.99: