Be on the lookout for this peelie spotted on Kellogg's cereal.
It's good for $3 off a gallon of any brand milk with the purchase of 3 Kellogg's cereals 8 ounces or larger.
I didn't rip the coupon off to read all of the terms but I'm assuming you should be able to use coupons on the cereal you have to purchase to use the $3 discount on the milk.
The coupon expires June 30 2012.