Sorry for the stupid question, but I can't seem to find the answer :( for this formula, is there a certain time limit we have to finished an opened bottle? My daughter drinks about 24 ounces a day, and there's 32 ounce in a bottle so it'll be a little over day in a half to finish. Do you think that's okay, as long as its refridgerated? Secondly, I'm buying in bulk, do I need to store all the bottles in the refridgerate or can I just store the one I use and put all the other ones in room temperature?