Title: You CAN return opened formula.
I bought that $30 can of Alimentum and now don't know what the heck to do with it, so I called Walgreens, where I bought it from, and they said they cannot take it back, legally (probably because of that whole smuggling cocaine in baby formula thing that happened a few years ago...people do crazy things). So, I called Similac, told them what happened (it made him throw up for two hours straight after a few bottles...) and they were more than happy to send me a check for the amount I paid for it. She asked me how much I paid for it, didn't even want me to send the receipt or anything, and said a check would be mailed to me within the next two weeks from Abbott Labs. She told me just to discard the formula.
So, if you have opened formula that didn't work out for your LO, call the 800 number on the can!
Re: You CAN return opened formula.