I never liked birdnest even though my mum cooks for me on a regular basis since young even when i was not preggy.
I usually only like cold birdnest cause it has less birdnest "smell" hahaa...
If worried for bb, then u girls can take out the birdnest for 5-10mins, not so cold then eat also can lah...
Sometimes i also take frozen yogurt, i think as long as not everyday, should be fine.
Only soft drinks, gasey ones, i avoid. Though i sip from my hub once in a blue mood.