Tilt the bottle. Tilt the bottle up so that formula fills the nipple. You want to be sure that your baby swallows as little air as possible. You want the formula to come out at a good rate. You can check by turning the bottle upside down and shaking it. It's coming out at a good speed if there is a little spray and then a few drops. Burp your baby midway through the bottle.
Pace feeding. If your baby is used to breastfeeding introducing the bottle can sometimes be difficult. You should try to introduce it at about a 1 month of age. Use a technique called pace feeding, which means you allow the baby to suck at the bottle nipple for about 10 sucks, then tip the bottle back and give your baby a break. This imitates nursing and allows the baby to drink the bottle slowly.