I have been using thePlaytex Ventaire Baby Bottles for years with all three of my children. I enjoy them because they don't seem to give the children digestion issues, gas, or too much burping. The bottles have an "L" shape which allows the baby to easily digest without having to hold the bottle too straight or vertically. This also helps when other people are feeding your child or my six year old son who sometimes has to help out in the car! He can feed her without having to be sure to hold the bottle straight up and down the entire ride. The formula easily moves to the nipple.