[ZOM_BIES]

Wouldn't the ice already damage the package while being in the post office?

As he is using dry ice which directly changes from solid to gas (knows as deposition), this would prevent the package from getting damaged but I wonder what how the gas would escape?

Maybe if he put a small hole in the box or the tape - but not an obvious one?

I think it won't work cuz the smoke is quite easy to notice
See this vid https://www.youtube.com/watch?v=vPhZzsAgc7Q [Start at 1:17]