@ilovebabyjosiah, you can microwave it when they turn 3 months because I do it an my son is perfectly fine just not too hot an it saves time lol but you do what uu feel is best..

boil water in a pot. place bottle in for little until it's heated up

I do the microwave for 15sec and shake it for about 2min to make sure it cools down a bit before I give it to my kids and I did this with all my kids.

All the formula brands I've tried actually say that one feeding v has started use within 1 hr not 2, not sure if it makes too much of a difference but ya

I always heated the bottle up in boiling water in a pot on the stove. Test it on your wrist to make sure its not too hot. Shake the bottle well to mix the heat and distribute it evenly.

a bottle warmer. even placing the bottle in boiled water.

run under hot water