Thank you Laura for emailing me about this!
"Hy-Vee has General Mills Cereals $5/2. When I bought 4 last night, I got a catalina for $3.75 off milk courtesy of General Mills."
Be sure to use $1/2 coupons HERE or from recent inserts to get these for $2 a box! Also I think Hy-Vee milk is actually priced around $2.67 a gallon so you will actually get overage on the deal!
Does anybody know anything else about this? Like if you have to buy 4 boxes or when it ends?