I'm thinking Kool-aid or a cheesestick is your best bet.
Then again, if you have coupons there could be some even cheaper deals. For instance, if you have the wacky mac coupons they run about 1.03 or 1.09/pkg - the coupon is .50 off and doubled it makes the item less than 10 cents.
If you have cottonelle, gatorade, powerade, propel coupons - there could be some great deals there too.
I am very new to kroger catalinas, but have mastered RR's at Walgreens, which means that in order for the RR to work it must have an item without a coupon to work. Is Catalina's the same way?