Originally Posted by
EJetter
To clarify, the cooling comes from blocks of dry ice packed inside the cool boxes. It's very effective and usually the breakfasts are still frozen solid when they're put in the oven.
Given the OPs appetite for asking such questions, it’s probably best to just to clarify further : are the breakfasts pre-frozen and kept frozen by the dry ice, or are they supplied chilled then accidentally frozen in the cool box by ‘too much’ dry ice ?