You may be asking yourself how a simple little bottle could be classified as a fossil. Oh, what little you know! Landen has been off the bottle since last May. That would be approximately 8 months ago for you non-math types. We found this bottle a mere few days ago. It was hiding in the back corner under the twin bed in Landen's room. We never use the bed, so there has never been any reason for me to move it. Also, remember that Landen got off the bottle 8 months ago but that doesn't mean that is how old the bottle is. It could be MUCH, MUCH older. So, in case you were ever curious as to what happens to formula after it has been sitting out for a long time, here is your answer.