FTM: Warming a bottle on the go?

Gabrielle

Hey! FTM here and I have a (dumb?) question. I breastfeed and recently started pumping as well. My question is if I wanted to feed my son a bottle on the go, how can I get it warmed up for him? Or do I need to do room temp? Buy a portable warmer? What's the recommendation on that? Or just use a thermos? Please help!