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Here is what USDA and Extension programs say to keep out of the food cooler, or to pack differently, plus a short quality tip from a cooking site, labeled separately.
The short answer: do not pack unsealed raw meat, warm food or leaky containers. Pack cold food straight from the refrigerator or freezer in sealed, watertight containers, keep raw meat wrapped at the bottom or in a separate cooler, use plenty of ice or frozen gel packs, and add a thermometer. A separate drinks cooler helps keep the food cooler closed. Keep perishables at 40°F or below, and throw out food left out more than 2 hours (1 hour above 90°F).
Key takeaways
- Wrap or seal raw meat, poultry and seafood and pack it at the bottom, or use a separate cooler, per USDA and Extension.
- Pack perishable food straight from the refrigerator or freezer. Do not load warm food in with the cold; West Virginia Extension says hot food is hard to keep at safe temperatures.
- Keep drinks in their own cooler when you can, because opening the food cooler all day warms the perishables.
- Throw out perishables that sat out more than 2 hours (1 hour above 90°F). Clemson says to pitch anything that warms above 40°F, and when you cannot tell how long, throw it out.
Things you should never put in a road trip cooler at a glance
| Unsealed raw meat, poultry or seafood | Seal or double-wrap it and pack it at the bottom, or use a separate cooler |
| Warm food in a cold cooler | Pack food straight from the refrigerator or freezer; cook on site when you can |
| Drinks in the food cooler | Use a separate cooler for drinks when you can |
| Open or leaky containers | Use sealed, watertight containers so meltwater cannot reach the food |
| Food that has warmed or sat out | Throw out perishables left out past the time limit, or any that Clemson would pitch above 40°F |
| Food for later buried under today’s snacks | On longer trips, use a second cooler for food you will need later |
Seven things to keep out of your cooler, or pack differently
1Unsealed raw meat, poultry or seafood
USDA Food Safety and Inspection Service says to store raw meat, poultry and seafood in a separate cooler, or wrap it securely at the bottom, instead of loose with other food. West Virginia University Extension (reviewed May 2022) says to double-wrap raw meat or poultry or seal it in plastic bags, and to “always pack raw meat at the bottom of your cooler.” Mississippi State University Extension says to seal raw meat and seafood in sealed containers or zip-top bags. Clemson Extension says raw meat can go in frozen.
2Warm food in a cooler meant for cold food
USDA says to pack perishable food straight from the refrigerator or freezer. West Virginia Extension says to transport chilled foods and cook on site when possible, since hot foods are hard to keep at safe temperatures. Our reading: a cooler holds cold more than it creates it, so warm food loaded into it warms its neighbors. Our guide to putting hot food in the fridge covers chilling cooked food before you pack it. If you carry food hot instead, Clemson says to keep it at or above 140°F by wrapping it in insulated bags and towels, so check it with a food thermometer.
3Drinks you will reach for all day
USDA says to keep one cooler just for beverages, since it gets opened often. Clemson agrees: pack drinks in a separate cooler so frequent access does not warm the perishables, and keep ice for drinks in a leak-proof, resealable container.
4Open, loose or leaky containers
USDA says to keep food in watertight containers so it does not contact melting ice water. Mississippi State says to seal raw meat in containers or zip-top bags. A Gwaltney Foods guide suggests a barrier between ice and food so it does not get soggy, which is a quality tip and not a safety rule. LSU AgCenter says to have frozen ice packs and avoid loose ice, because contaminated cooler water can affect other foods, and West Virginia University Extension suggests freezing water in clean milk cartons as a longer-lasting cold source.
5Food that has warmed or sat out too long
Clemson says to pitch any food that warms above 40°F, which is the stricter rule. USDA’s limit for perishables left out is 2 hours, or 1 hour when it is above 90°F. Clemson also says to discard meat or poultry that feels warm after the ice has melted; a thermometer is a more reliable check than touch. If you cannot tell how long food was warm, throw it out. Raw meat is not banned from a cooler: kept cold, sealed and separate, it is fine. Its rule is “when in doubt, throw it out.”
6Food for later buried under today’s snacks
USDA and Clemson both suggest more than one cooler for longer trips: one for the day’s lunch and snacks, and one for perishables to be used later, opened as rarely as possible. Our practical tip: pack the day cooler last so it is on top, and leave the perishables cooler closed until you need it.
7Foods that do not hold up well in a cooler
This one is about quality, not safety. Food Drink Life lists lettuce, berries and sliced fruit as foods that do not hold up well in a cooler. That is cooking-site advice, not a USDA or Extension rule. Salads and sandwiches are not off limits: Clemson says to keep summer salads and road sandwiches on ice throughout the trip. It also says whole fruits and vegetables, bread, crackers and peanut butter do not need refrigeration, which frees up cooler space.
Mistakes beyond what you pack
- Putting the cooler in the trunk. Clemson says to keep it in the passenger area, not the hot trunk. USDA also says to keep it in the shade at the beach.
- Leaving empty space. A full cooler stays cold longer, so fill gaps with ice, or with non-perishable foods, per USDA and Clemson.
- Opening it constantly. USDA says to open the food cooler as little as possible.
- Skipping the thermometer. USDA and Mississippi State suggest an appliance thermometer in the cooler that reads 40°F or below.
- Running low on ice. Clemson says to replenish ice as soon as it starts melting, and a thermometer shows whether perishables are still at 40°F or below.
How to pack a road trip cooler safely
- Chill everything first. Pack perishables straight from the refrigerator or freezer.
- Seal raw meat. Double-wrap or bag it and put it at the bottom, or use a separate cooler.
- Use plenty of ice or frozen gel packs. Fill any empty space.
- Split the load when practical. A separate drinks cooler reduces opening, and on longer trips a second cooler protects food for later.
- Add a thermometer and keep the cooler in the passenger area, out of the sun.
- Monitor the temperature during the trip. Throw out perishables left out more than 2 hours (1 hour above 90°F), and when in doubt, throw it out.
For more trip planning, see our road trip tips and budget road trip tips.
Things you should never put in a cooler: your questions, answered
What should you not put in a cooler?
Unsealed raw meat, poultry or seafood, warm food, and open or leaky containers. Raw meat is fine when it is cold, sealed and separate. Drinks are best in their own cooler.
Should you put drinks in the same cooler as food?
USDA and Clemson say to use a separate cooler for drinks, because it is opened often and the extra opening warms the food.
See also
Where should raw meat go in a cooler?
At the bottom, double-wrapped or sealed, per West Virginia and Mississippi State Extension, or in a separate cooler per USDA.
Can you put warm food in a cooler?
The sources say to pack perishables cold, straight from the refrigerator or freezer, and that hot food is hard to keep at safe temperatures.
How long does food stay safe in a cooler?
The sources give a temperature and a time limit, not a number of hours for the cooler. Keep perishables at 40°F or below, and use the 2-hour rule (1 hour above 90°F) when food is out. Clemson is stricter and says to pitch anything that warms above 40°F.
Does food need to be in the cooler at all?
Perishables like meat, poultry, eggs and fish do. Clemson says whole fruits and vegetables, bread, crackers and non-perishable drinks do not need refrigeration. Milk and other drinks labeled keep refrigerated still need to stay cold.
Should you use ice packs or loose ice?
LSU AgCenter says to avoid loose ice and use frozen ice packs, because contaminated cooler water can affect other foods. USDA lists ice or frozen gel packs. Either way, keep food in watertight containers.
Should you put the cooler in the trunk?
No. Clemson says to keep it in the passenger area, not the hot trunk.
The bottom line
Keep raw meat sealed, keep warm food out, keep drinks separate when you can, and keep everything at 40°F or below with plenty of ice. If food has sat out too long, or you cannot tell, throw it out.
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