DS just turned one year at the beginning of the month and up until then I breastfeed him when we were together and he had some formula, some breastmilk at daycare. We've transitioned him to WCM, but still have an almost full container of formula in the pantry. I don't want to throw it out and waste it, but am not sure if it's still okay to be giving him formula until the container runs out. Any ideas/experiences to share?