Reefer containers Have a very refrigeration device to the bulkhead close of the container. Whilst it's actually not a blast freezer, most reefer models are capable of preserving temperatures as little as -20F. Refrigerated shipping containers can also be insulated, and typically painted a light colour (like white or grey). https://andyjxsdn.yomoblog.com/36952370/detailed-notes-on-30-ft-shipping-container-for-sale-uk