Cold food ships in an insulated liner inside a cardboard box, with frozen gel packs for chilled goods or dry ice for frozen ones, on a service faster than the coolant's lifespan. Be aware up front: SMKlog's own checkout does not sell labels for perishable or temperature-controlled shipments, so this guide explains the method and shows the honest transit numbers rather than selling you the label.
The transit column below came from carriers on 2026-07-27, and it is the column cold food lives or dies by.
A loaded cooler shipment lands near ten pounds once insulation and coolant are in, so we show our 16 x 12 x 10 in, 10 lb test box on Newark, NJ 07102 to Atlanta, GA 30303. Read the right-hand column the way a melting gel pack would. Prices are full checkout totals including SMKlog's charge, listed for scale.
| Carrier | Service | Price | Quoted transit |
|---|---|---|---|
| UPS | Ground Saver | $17.56 | about 4 business days |
| FedEx | Ground Economy | $17.57 | 4-5 business days |
| USPS | Ground Advantage | $20.86 | 6-7 business days |
| UPS | Ground | $21.94 | 3-4 business days |
| UPS | 3 Day Select | $27.66 | 3-4 business days |
Notice what's absent: nothing here arrives tomorrow. The fastest window this quote returned was 3-4 business days, and a gel pack frozen solid on Monday is room temperature well before day four. That single observation explains the entire commercial cold chain: overnight or two-day air, thick insulation and generous coolant, priced accordingly. It also explains why weekend handoffs are planned around, since a box sitting in a depot on Sunday burns coolant while moving nowhere.
Foam coolers and reflective liners slow heat transfer; they never stop it. Thicker walls extend the hold, and our insulated box guide covers the container types and what one costs to move. The coolant does the real work, and the insulation just rations it.
Frozen gel packs keep contents in refrigerator territory and ship without paperwork. Dry ice holds things hard-frozen but is regulated as UN1845, with per-carrier limits and marking rules we lay out in the dry ice guide. Choose one based on target temperature and size the amount to the whole window, not the hoped-for arrival.
Perishable, frozen, live and temperature-controlled contents are excluded from SMKlog online labels; the full list sits on our shipping restrictions page. Jerky, hard candy, sealed baked goods and other shelf-stable foods quote normally, described as exactly what they are.
Inside an insulated container within a cardboard carton, cooled by frozen gel packs for refrigerated goods or dry ice for frozen ones, on a service fast enough that the coolant outlives the trip. Commercial food shippers plan the coolant around the slowest realistic arrival, not the advertised one.
Gel packs hold a chilled range and are unregulated; dry ice holds deep-frozen but is a Class 9 hazardous material with carrier rules attached. The deciding question is the target temperature: refrigerated calls for gel, frozen calls for dry ice, and mixing both wastes cooler space.
No. Perishable, frozen and temperature-controlled contents are outside our online checkout, as our shipping restrictions page spells out. Shelf-stable foods are a different category and can be quoted normally with an honest item description.
On our 2026-07-27 test lane the ground quotes carried windows of 3-4, 4-5 and 6-7 business days depending on service. Cold-chain planning has to assume the top of the window plus a weekend, which is why serious perishable shippers pay for air.