Bests & Worsts Reviews from Amazon

I don’t really understand how it works exactly (I’ll leave that to the product description) but it does! Do know that this won’t be the same as an actual refrigerator. It’s highly recommended that you put in food that’s already cold or throw in an ice pack or two because the temperature is dependent on the temperature of the items that you put in. You can plug it in when it’s empty and it’ll cool down the inside a good amount, but the colder the items the colder the cooler can get. Priming the cooler beforehand is something I do often. Before heading out on my road trip, I plug it into a wall (wall adapters are separate), throw in an ice pack or two and leave it for like 30 minutes to an hour. After that, the cooler would be around 40 degrees Fahrenheit or colder. The longest trip I’ve been on was around 8 hours and the cooler kept up. Unplugged, the cooler can’t really keep cold for as long as a regular cooler. I’d say around a few hours give or take depending on the outside temperature. My guess is that the fan component on the lid is essentially an open hole for cold air to leak out. Not Igloo’s fault since it’s part of the design, so make sure to keep that in mind. I’ve tried leaving it overnight at my hotel, but the temperature increased around 10 degrees the morning of so I wouldn’t recommend it for long-term use unless the items you're trying to cool aren’t very perishable. That or if you put in more ice/ice packs every several hours or so. I also suggest getting a small thermometer to track the temperature of your items. It’s pretty big so don’t try to squeeze a full car of people on a road trip, but the large size makes it great for carrying a bunch of stuff. I’ve had mine for a few months and I’ve never had any problems with it. There’s definitely a lot of factors to keep in mind, but overall, this product has worked as advertised and I haven’t had any problems with it. For the price, you won’t find a better thermoelectric cooler.