How soon to start a bottle

My newborn is almost two weeks old and I've been exclusively breastfeeding, and pumping after each feeding to build up a breastmilk stock. However, I feel like my husband is missing out on valuable bonding time with his son since I'm the main one tending to his needs right now because when he's fussy, it's usually because he's hungry and I'm the only one who can take care of that now. So I'm wondering - how soon is it okay to start giving my baby breastmilk in a bottle, so that daddy can feed too and have some bonding time (and give mommy a break)?