Can a Cool Cube™ be locked? Yes. The large cooler can be locked with a small, steel padlock. The small and medium coolers have double zippers that can be fastened together with a small, cable padlock. Post navigationPrevious post: Is electricity needed?Next post: Can a Cool Cube™ hold two different products at the same time? Comment on this FAQ Cancel replyYou must be logged in to post a comment.