They have tiny air vents at the bottom to help with any gas air type thing

Playtex vent aire is what I use n it's great

@ev14, thanks for your info about Avent :)

We use the Avent anti colic bottles & they did us wonders when my daughter was a new born. We continue using Avent & she's going to be 10 months! I recommend them :)

I've been looking into the Avent or Tommee tippee. has anyone used those ones and if so what are your thoughts on them?

I heard the doctor brown's are very good !!

The drop in liner kind....then you don't have to sterilize the bottles....less work less stress!!

Ooh me too. Following