Early in the morning most women have a greater milk supply. As you sleep, your prolactin levels go up. Prolactin is the milk-making hormone. Nursing your baby in the morning off one breast and pumping the second breast is a great way to begin storing milk in the freezer in preparation for your return to work. Make sure you eat a nutritious breakfast and drink lots of fluids after you have emptied your breasts so completely.
All babies are different and respond uniquely to various types of bottles and nipples.
Many babies prefer the tasteless silicone nipples over the rubber ones. Look for nipples that will feel similar to the shape of the breast in the baby's mouth. The base of the nipple should encourage the baby's lips to flange outward. Many mothers in my practice have found that the Avent bottles and nipples work very well for their breastfed babies. The answer to this question depends upon how old your baby is at the time you return to work and how often your baby has been nursing during the period of time that you will be away.