HELP! Baby rejecting bottle!

My 12 week old was doing so well - I'd express the odd feed for him (since 5 weeks of age) and he'd take the bottle from Nana, aunty, Dad... whoever basically.
Now, for some reason, he won't. He won't suck or take the bottle from ANYONE - just screams until he's purple and I get a call to come back from the supermarket, or wherever, and calm him with a breastfeed.
It's not the milk - we've tried it with an eyedropper and a teaspoon and he laps it up. We've even gone and tried different teats. No change.
Why has my baby suddenly done this and how can we get back to bottle feeding? I have to go back to work in January for a few days - this is going to be a disaster if we can't get him to take it!!

i'm sorry hun....

we went through exactly this with jack when he was the same age. he started having bottles every now and again from 3-4wks old and had no troubles taking them, then all of a sudden without warning, he refused. no matter what teat, bottle, different people, me out of the room, nothing seemed to make a difference. then after couple of months of trying, he took a bottle!!!

this is of course, no help what-so-ever