Wean off direct latchin

Hi mummies.. I have a problem here. Current Bb goin 13m. All the while I’ve been direct latching. So now I wanna wean her off my breast but havin alot of difficulties. I tried to give Bb fm b4 her napping time, using milk bttl, straw bttl, sipper cup but she’s not drinking. The most onli drink 20ml n she come looking for mi to latch. Usually I only try this in the morning. Does anyone encounter this problem? How/wat should I do ? Feeling stressed as I need to wrk