Transition to cow milk help!

My daughter is about to turn 11 months, she is currently on formula and not to interested in a lot of foods. Shell drink water from a sippy cup. I decided to just try it out put some milk in her sippy she took literally two sips and wanted nothing to do with it. I put the milk in a bottle (cold) again took a few sips and was done with it. I warmed it up slightly she took most but not the whole bottle. If shes not taking it because its cold how the heck am I going to transfer her over to just milk at 12 months. You cant keep milk at room temp like I do her bottles. Also if your out how do you give milk??? And keep it cold (from going bad) but warm how she likes to drink it. Ughh im stressing out!! Help this momma out. TIA!!!