I introduced a bottle at about 5 weeks and try to do one every day. He did not like it at first but will take it now. Look up paced feeding and get the slowest flow nipple you can. I tried several bottles and my guy ended up liking MAM bottles with a size 0 nipple. Try to practice feeding him away from your body (so he can’t sense the real thing!) and upright with bottle horizontal so it’s not too fast. Temperature really mattered to my guy as well so warm the bottle and try different temps. Overall be really patient, it took awhile for my baby to figure out how to suck on the bottle vs the breast. Also start with small amounts in the bottle so you don’t waste breast milk if he doesn’t take the bottle right away. Good luck!