For all frozen orders, we include bags which contain dry ice.
Dry ice is frozen carbon dioxide, which evaporates slowly. The bags may appear empty by the time of delivery as it skips the liquid phase and goes straight from solid to gas.
The dry ice keeps the items frozen by keeping the atmosphere inside the box cold, it's why we have the full box liner, to seal the air in.
If you have any queries at all please do get in touch - email us at firstname.lastname@example.org or give us a call on 0203 950 0455 and a member of the team will be happy to answer your questions!