We bought the car cooler in Mai 2018 at walmart (still warranty). The car cooler is as good as new and we used it to keep our food cool during our travels. But there is also the possibility to keep food warm. It works really good, we just have to sell it because we move to another country. Have a look at the following website to find out more about the cooler. https://www.koolatron.com/US/en/koolatron-p20-12v-compact-coolers