I have one I pre make 4 bottles at a time.. That way the bubbles settle (makes for less gas and fuss) I have the munchkin one from target it's the $40 digital one.. I love it.. 3 1/2 mins in the warmer it's ready by time I've changed a diaper.. Swirl it to make sure the temperature is even.. Test on your wrist and feed.. It's saved SO much time and So Much money by not running the hot water all day everyday..

Why wouldn't they be good to use? Lol don't listen to her. Just follow the directions for your bottle warmer! You're fine!

I use one. I think it's quite necessary.

i have the MAM bottles, and i dont have a cup that will fit them.

i have a bottle warmer, which i thought was working good. but than my mother in law told me they arent good to use. @valerie_jean

We used one because we made formula in a formula pitcher and stored the formula in the fridge and had to warm it up to feed E. Either the formula pitcher grew enough amount of bacteria (was always washed in the dishwasher, and never left in the fridge for more that 12 hrs) or the formula was getting heated up too much (went by lower than the recommended heating settings on the booklet) long story short, Elliot got diarrhea bad, he couldn't keep anything in. I would not recommend it at all. As soon as we stopped using both he went right back to normal.

I didn't like mine at all. So I switched to using a cup with hot water and sticking it in there.