Bottle refusal is common, especially when transitioning back to work. Try offering the bottle when the baby is sleepy (dream-feeding) or have a caregiver other than the breastfeeding parent offer it while you remain out of sight, as babies can sense your presence and stress. If they continue to refuse, don't force it to avoid creating a negative association; try different bottle brands or flow rates, and consider using a sipper cup or spoon as an alternative.