always better to be looking for a job from the security of already having one...
keep fishing for the coke one whilst accepting the sales job. if you land coke, fuck the sales one off. dont think for a second that they wouldnt dump you just as quickly if it was in their best interests.
Second that one.
Got caught in a similar situation and hung out for the second one. Bad move as the next one didn't come up trumps for another 6 weeks ....