When introducing the bottle, everything should be different!
If your baby is refusing the bottle change it up! Anything that might slightly resemble breastfeeding may cause them to refuse and hold out for what they really want. Babies are some times smarter than us. If you have a daycare/nanny set up for when you are returning to work try feeding the bottle there. Get your baby accustomed to where they will be taking the bottle. And if your baby doesn't take the bottle on the first, second or fiftieth try try keeping it as positive as you can.