While I was pregnant I was obbessed with having my baby drink from an Avent or Platex Ventair bottle.  When my son was finally born I had so many of those bottles because it is what I had on my baby registry. BIG MISTAKE!!!  I went to BabiesRUs desperate to find a bottle that will not spill all over my son and that it reduced his gas.  After being in the store for atleast two hours I decided to purchase the MAM bottle. WOW it really works.  I am so happy with the bottle that I promote it like I own stocks in the company.  The best decision I made for my son thus far.