Somebody have try it.

Lets us know the result.

I use cooler box a lot. Due to outdoor activity. Have several cooler box but all is coleman.

How long can it keep the cool inside is depend on

1) the surrounding environment. If the environment is hot, it will shorten the cooling inside. If put in the office and aircon environment, of course, it can last longer.

2) How often you open/close the cooler. Once open the cooler lid, cool air will escape. More often open, faster the ice melt.

3) How you pack the ice, food, and size of the cooler will also determine the longer cooling.

Get the cooling box that is tested or guarantee to cool for a period of time.

Unless you want cheap then go for China nonbrand. Test and judge yourself.

If you looking for a quality and performance cooler, of course US brand is top. But come with the price.

If simply just want an everyday 8hr cool only, any cooler, china wan will do.