After deciding on the type of bottles you will use in bottle feeding your child, your next decision will be the number of bottles that you will need.
For starters, your selection of baby bottles can be small. You can buy a few different baby bottles or a combination of two brands of newborn starter kits. As your child grows, you need to purchase additional bottles.
At an average, you will need to own about 4 to 12 baby bottles, depending on whether your bottle feeds your child on a full-time basis or not. If you are a stay-at-home mother and breastfeeding your child, you can purchase an average of six baby bottles.
You can start with four-ounce bottles as they are perfect for newborn. Newborns consume small amounts of breast milk or formula milk in one feeding session.
You can shift to larger bottles of about eight ounces to nine ounces when your baby reaches four months. At this time, your child can already consume more milk and has a bigger appetite. Having larger bottles at this time is more practical that continuously using the smaller sized baby bottles.