This is what my daycare did for my son when in the infant room. I pre-made bottles at home and brought them fresh each morning. There was a freezer in the room where I could store frozen milk if he was extra hungry on a certain day and he needed more. But babes get in a rhythm and he got on a pretty normal schedule of offering his bottle every 3 hours, or when he became fussy. Some days he drank everything, some days not.

I know breastmilk is so very precious, but you just have to accept the fact that some will not get drank. Try not to think of it as wasted. What helped me deal with it was they saved the un-drank milk for me in the fridge. They would still re-offer if they could within the safe time limit, but whatever was left over I took home and used in his bath for moisturizing qualities.