It is wise to practice with your feeding equipment before you go into the hospital, so buy it well in advance of your delivery date. Large department stores and drugstores sell bottlefeeding packs that have all the essential equipment.
I always found it most convenient to sterilize and make up a full batch of bottles, and refrigerate them until needed. After the feeding, rinse the bottle in warm water and then put it aside. It is a good idea to continue sterilizing all formula-feeding equipment until your baby is 12 months old.