I agree with Slim...why wait even a moment if you have the facilities to do it immediately? As far as unwrapping a shrink-wrapped box, I'd leave it on until you were ready to smoke one. The only reason I could see for removing the wrapper now would be if you were worried about how they have been stored and/or shipped. In that case, you may want to open the box up (even remove the cello) to allow quicker (but not too quick) moisture absorption....that is probably not necessary though (if bought from CB, I wouldn't worry).