My dr of my first said it is easier on their stomach if warm but I feel better warming however I have had to do room temp before and baby was fine. First one would not have room temp

Hi there! We recommend mixing with warm water to ensure it dissolves quickly, easily, and with as little foam as possible (although foam is totally safe for baby and normal!), but ultimately, you can use whatever temperature water baby prefers.

My LO won't take a room temp bottle, but we've always just warmed it so we probably created the preference! I've read there is nothing wrong with room temp though:)