We purchased yesterday a box of baby formula singles as well as a bottle of the ready to use formula. Both are Similac advance. My husband did not read the exp dates. I received a call today from the sitter that the formula our newborn had been drinking all day was expired I quickly rushed to check the dates on the singles and they too expired in 2008. It is extremely harmful to the babies and can cause upset stomach and worse. It is wrong for the store not to pull these products from the shelves.