i really dont understand similac fr

ni

i have concentrated similac soy . we have to refrigerate it and throw it out after 2 days . and i know after a hour after of feeding. I KNOW YOU HAVE TO THROW IT AWAY AFTER AN HOJR AMD ITS HAS TO BE REFRIGERATED once opening the bottle/can . thats not my question . my question is What am i supposed to do when im NOT AT HOME and have to feed her . is the milk (that came from the fridge) allowed to sit in her diaper bag until its time to feed her ? basically wear leaving to go to another county for a few hours to see her dad & i just put the bottles in the diaper bag until shes hungry then feed her . is that okay ? & i just made a bottle for her to eat before we leave because its an hour and a half car ride and she ain't even hungry she ain't drink it at all . is it okay to throw that in her diaper bag until she is hungry . or since i warmed it up its no good after a hour