HOW DO INSULATED BAGS KEEP FOOD COLD AND HOT?
Portable coolers stay cold with the magic of insulation and ice. The insulation, which is usually made from foam or plastic, lines the inside of your cooler, slowing down the circulation of warm air. The ice, meanwhile, keeps the inside of your cooler nice and chilly.
The insulation inside the cooler slows down the warm air through a process called convection. If you didn’t pay attention in science class, this is when hot air travels around a space and increases the temperature.
While thermoses and insulated cooler boxes rely on a vacuum created between the outer layer and the inner layer to prevent energy dissipation, insulated cooler bags keep food and drinks warm or cold thanks to a core layer made of dense foam. The thicker and denser the foam, the better the insulation.
The foam layer prevents heat from seeping to the outer layer and keeps the surrounding cold or heat from reaching the bag’s contents. You might notice that insulated cooler bags' exterior doesn;t heat up when filled with heated items as the heat is prevented from dissipating in the surroundings. (Most cooler bag's outer layer is usually made of non-woven fabric, vinyl, or heavy fabric. As an extra layer of protection, many insulated cooler bags come with an inner layer or a lining made of foil, heavy vinyl, or plastic that is waterproof and heat reflective.)
There are things you should look into when you;re thinking of buying brand new custom cooler bags. You should make sure you understand the difference between insulated and non-insulated bags. Try to look into a cooler bag;s basic mechanics before deciding which custom cold bag is right for you.
CAN YOU USE A COOLER BAG TO KEEP FOOD WARM?
This is a simple hack most people don't know, but yes you can use a cooler bag to keep food warm. When asking how a cooler bag works, most people don't even think to consider that the same insulation that’s used to keep things cold, can actually work to keep things warm. This is great if you're bringing a hot meal to a party and want to help keep the temperature before it's being served, or simply packing a hot lunch and want to keep it warm. In general, a cooler bag will keep things warm considerably less time than they'll be able to keep things cool.
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