Koolatron 36 Quart Portable Electric Cooler - 12V Car Refrigerator for Camping, Travel, Road Trips & Boating | Insulated Hard-Sided Cooler for Food & Drinks | No Ice Needed | Perfect for Picnics, Beach Days & Outdoor Adventures

I really researched which cooler to buy. I read the reviews, thanks to everyone who posted and didn't want to spend a fortune, but was willing to spend a bit to get a good working product. Went with the Koolatron for many reasons and have to say after 11 days on the road running nearly non stop that I made the right choice 100%!We ran this thing non stop nearly both in hotel rooms and in the car. After 7 days, a bag of ice I had added at home was still frozen solid and it was colder inside cooler than hotel fridge. No joke! I was afraid to put the food in the fridge so just keep them in the cooler and put the drinks in the fridge.Add a couple ice packs or a bag of ice as it help keep the temp even lower and since our Honda Odyssey Touring plug in the back turns off when engine is off, the ice helps keep the temp down during gas fill ups and bathroom runs without sacrificing coolness.I noticed no ice or frost build up after 7 days, but chose to turn in off for a short time & dry it out just to be safe. What I did notice was after that when car was turned off somehow we had a bit of water in the bottom and did not dry it out, then the frost built up. I think because the food was out for a couple minutes, persipration developed on the food. I believe if there is perspiration or additional moisture inside, then likely to get frost. Still ran with frost, but I decided to dry it out and defrost to be on the safe side. I also wiped down food before putting back inside. THis time no frost build up.Bought the adapter plug for using in the hotels and did as other reviewers said. I cooled it down the day before at home without anything inside so it was cold when we started and added only cold food & drink to it. THIS IS VERY IMPORTANT. No moisture produced. Adapter gets hot for sure. Almost scary, but no problems with it.This was NOT our main cooler, but for our foods like meats, cheeses, milk etc. that needed to stay cold all the time. Stayed as cold as my fridge at home if not colder keeping ice frozen even in outdoor temps up to 100 degrees while engine was running!We had a standard cooler with ice for drinks that was used allowing the Coolatron to protect vital foods. Highly recommend this cooler and adapter, but Amazon needs to fix the packaging as we did have minor damage and could have easily been destroying or severely damaged in shipping. Do not order last minute. We did and had one wheel with minor damage and the plastic restrainer for the lid was broken. No time to exchange, but works fine without.