I don't know that it matters specifically but we use Enfamil Gentlease. DH was a huge help last night washing bottles and making formula and making bottles for today. However, this morning when I went to pack Levi's bottles for daycare, I noticed that he had made another pitcher of formula as well. Which means, after his last bottle tonight I will still have enough formula left for 2 to 3 bottles. I know you are not technically supposed to use made up formula after 24 hours, but would it really hurt to use it for the first couple bottles tomorrow morning?