Temperature-Controlled Shipping—and What Makes Dry Ice Cool

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Due to lockdowns, quarantines, and the urgent need for pharmaceuticals, medical supplies and perishable food, temperature-controlled shipping and logistics have become a hot commodity. The pandemic has presented many challenges to the shipping industry, including the fact that not all items are created equal. Some of the most desperately needed products right now require stable temperatures and special handling. During normal times, frozen food often comes to mind when thinking of temperature control, but The International Air Transport Association (IATA) defines perishable items as:

Contents [that] will deteriorate over a period of time if exposed to severe environmental conditions like extreme temperatures or humidity. Examples include (but are not limited to): pharmaceuticals, seafood, dairy, plants, meat, fruits and vegetables.

The shipping journey may be unpredictable—especially in the uncertainty of our current situation—but proper temperature controls and packaging can help make for a stable trip.  

Innovative companies like HelloFresh have delivered on greener ways to ship temperature-controlled products, such as recyclable packaging. Goldbelly has built a business on helping other businesses—shipping them gourmet and regionally iconic foods. Their business model therefore depends on successful temperature-controlled shipping.  

The most popular shipping materials used for insulation: 

What Exactly is Dry Ice?

Dry ice is simply a solid form of carbon dioxide and universally used as a cooling agent. It’s easily manufactured, and used mostly to preserve and freeze food. 

Dry ice can be a miracle ingredient to your shipping, but keep in mind that, as a solid, it will naturally convert back to carbon dioxide. That means it doesn’t thaw; it just sort of gets gassy. This gaseous element needs to escape during the length of the journey, so make sure your packaging is ventilated so that the gas can escape. 

How Dry Ice Became Cool

Before dry ice became a thing in the late 1920s, salt was usually added to water and then frozen. The result of this process was called “brine ice.” Its main purpose was to keep ice cream frozen as it traveled from manufacturers to retail stores. However, it was not ideal; it was heavy and wet, and, because of the salt, corrosive. Yep, yuck. 

In 1925, The DryIce Corporation of America was producing dry ice, but no customers were yet biting. That is, until the Schraff’s Stores gave them a try, to keep their Eskimo Pies cold. As a result, customers could buy the pies cold at the store and bring them home to their iceboxes. By 1929, DryIce partnered with Liquid Carbonic and built 17 dry-ice manufacturing plants across the United States. Birdseye Frozen Foods came on board in 1931. By 1932, at the height of the Depression, more dry-ice manufacturers appeared and production topped 120 million pounds. 

Is Dry Ice Dangerous?

Not if it is stored and used correctly: 

Helpful hints from UPS: 

Don’t Forget the Dry Ice Label When Dry Ice Shipping

If you are going to ship with dry ice, you must use a proper shipping label. The United Nations and the UN Committee of Experts on the Transport of Dangerous Goods have assigned an identifying number to all shipments considered dangerous. For dry ice, that number is UN1845. All packages containing dry ice must include:

Gel Pacs: Alternatives to Dry Ice

The best way to determine if you need dry ice or a gel pack is the temperature you will need when shipping.  If you need your shipping package to be cold but not frozen, gel packs are often a good option. In fact, dry ice is best used for frozen shipping, such as ice cream. However, for shipping that only needs to stay cold-to-cool (32 to 60 degrees), gel packs are often used. 

Gel-packs are water based, so they normally freeze and thaw just like water would. Some pacs, though, are filled with refrigerant. Be sure to check the package before purchasing. Gel packs are often ideal for delicate goods like flowers. Always be sure to include lots of padding material (think bubble wrap or packing peanuts) to keep your products firmly in place during the journey. 

Benefits of a gel pac

Keeping It legal

Remember that dry ice is considered a hazardous material. That means it is subject to certain shipping regulations, by sea and by air. Gel packs, on the other hand, have no restrictions on the amount you use when shipping by air.

For specific regulations, consult the FDA website and the International Air Transport Association’s publication on Perishable Cargo Regulations. 

Best Outer Packaging To Be Used With Temperature-Controlled Shipping

Choosing proper shipping materials for your product is a big deal. The basic rule of thumb: keep heat out and coolness in. 

Here’s how UPS advises your choice: 

Items you will probably need for your shipment: 

Things to Keep in Mind

Temperature-controlled shipping is nothing new, but advancements made over time have helped to make it much more effective, efficient and accessible, which will come in handy as we navigate the current situation.

Need a fast, efficient and cost-effective shipping solution? Check out Shippo today.