I am being brave and going out for the evening with my DH on Tuesday while my mum babysits DS, and want to leave a bottle of EBM in case of emergencies. But as he's never had a bottle before I don't know how much he'll need at a feed. Expressing takes me forever so don't want to do more than I have to, I have just spent 45 mins getting 3.5fl oz, do y'all think this will be OK for one feed if he wakes in the evening for it?