Also, if you start heating up formula they’ll apparently have a hard time going back to room temperature. We used silicone bottles along with a bottle warmer f

Also, if you start heating up formula they’ll apparently have a hard time going back to room temperature. We used silicone bottles along with a bottle warmer for refrigerated breast milk though. Pro tip: buy a damned bottle warmer in that situation. Don’t try to get by putting hot water in a cup and putting the bottle in that. The $50 is worth your sanity when there’s a crying baby.