How to make your BF baby take a bottle?

Hi everyone! I'm a first time mom and since I gave birth I tried to breastfeed my baby as much as I can while I'm on my maternity leave. However, now that I have about a month and a half left before I return to work, we're trying to make her drink my breastmilk or formula from bottles. During her first month she has no problem switching from my breast to a Pigeon Latch on Line Softouch bottle. But since she pass her 9th week, we are struggling a bit to make her take the bottle now. Any suggestions? Thank you