are you pumping? or giving formula during this time?
either way here are a few links for you:
We introduced a bottle at 2 weeks with DD and she took it with no problem. We have continued to give her one bottle a day with pumped milk and the rest of the time she breastfeeds and it has worked fine. I have read in many books that you should wait longer to introduce the bottle, but I have also heard many stories about people waiting longer to introduce the bottle and then LO not taking one. I wanted to make sure DD would take a bottle and breastfeeding was going smoothly for us, so I felt comfortable trying the bottle at 2 weeks.