When should I introduce a bottle?

I plan to breastfeed my baby at least a year but I would definitely like him to except a bottle at some point. I am in no rush to introduce a bottle but wondering if I wait too long he will not except it?. He is 6 weeks and 5 days old and has done an amazing job feeding since birth.. I am extremely thankful for having such a good breastfeeding baby and a good enough supply to feed him and have over 800 ounces in the freezer.