D.J.
My son will not take a cold or room temp bottle either. And can you blame them? Formula tastes gross. If I’m only going to be out for an hour or so I preheat a bottle a little warmer than I’d normally give him, and bring room temp water with me if I have to cool it down a bit. I use the “munchkin” bottle warmer, it’s insulated and helps to keep the bottle warm. I usually do not have to use it to warm the bottle however, if I do, my bottle is usually warmish already so, I plug it in about 30 minutes before I will need it. Since I switched to this method I have NOT had a bottle problem. At first it was awful, he wouldn’t take a bottle that had cooled and was impossible to sooth, if your out in town that’s so unfun. He’s 8 months now and I started this method when he was about 3 months. My son is a healthy, beautiful boy. I wish you luck.
Best, D.