happily bf-ing, but want to be able to express in the future e.g. when i'm feeling up to a night out. tried it a couple of times when ds was 5 weeks and he took the teat fine. found the whole expressing thing more trouble than it was worth just to enable dh to give the night feed, so have given up on it for the time being. but - do i need to use the bottle every couple of weeks to make sure he still takes it?