If you're using a cooler to keep your food and drinks cold, you'll want to know how long it will actually keep things cold. Unfortunately, there's no one-size-fits-all answer to this question - it depends on a variety of factors, including the type of cooler you're using, what kind of food and drinks you're trying to keep cold, and the ambient temperature.
That said, in general, most coolers will keep food and drinks cold for around 24 hours. If you're trying to extend that timeframe as much as possible, there are a few things you can do. First, make sure your cooler is well-insulated - this will help it maintain its internal temperature for longer. Second, pre-chill your food and drinks before putting them in the cooler - if they're already cold when they go in, they'll stay colder for longer. And finally, try to avoid opening the cooler too often - every time you do so, warm air from outside will enter and further raise the temperature inside.
By following these tips, you should be able to keep your food and drinks cold in a cooler for at least 24 hours - though ideally 36 hours or more would be even better.