How long does it take to prep the Cool Cube™ for pack-out? L How long does it take to prep the Cool Cube™ for pack-out? It can take as little as one hour to condition the PCM panels, and as little as 2 minutes to pack it out. See User Guide for complete instructions. Post navigationPrevious post: Which panels hold what temperature?Next post: How long does it take to prep it for pack-out? Leave a Reply Cancel replyYou must be logged in to post a comment.