I have a question mommas ..ive been exclusively breastfeeding my 6 month old and I have been trying…

I have a question mommas ..ive been exclusively breastfeeding my 6 month old and I have been trying to get him to drink formula but he refuses it he seemed to not like Enfamil so I switched to Similac he seems to like it a tiny bit better but still refuses to drink it i plan to keep breastfeeding but I would like him to drink formula as well ..any suggestions how I can get him to drink formula?