If you are having a baby, you may be tempted to warm your baby's bottles prior to feeding your baby. Don't! If you warm your baby's bottles, they will expect warm bottles every time you give them a bottle. Babies are perfectly fine with cold bottles if you start them on cold bottles. Starting them on cold bottles will make your life easier for months to come. Warming bottles takes time, and it is very inconvenient to try and warm a bottle when you are away from the house. Do yourself a favor, start your baby on cold bottles from the beginning.