Question...

Ok, so I am a stay at home mom, don't work, so I am with my son all day every day and I exclusively breastfeed him. Well, I imagine that sometimes I will want to be able to leave him with someone (like his dad or my mom) or be able to go on a date with my fiancé, etc...and not have to worry about him taking a bottle and being able to eat. We have given him a bottle a few times and he takes it just fine (he is 7 weeks old btw), what I am wondering is should we give him a bottle once every day or is every now and then good enough?