I have owned several similar products from other companies and this one is by far the best made. I use it for both travellinng and grocery shopping.
My wife and I used the Cooler Cube during a 10 day road trip to southern Utah. The size was perfect for carton of milk, few fruits and vegetables, cheese, bottle of wine and ice. Every day as we traveled around, we would get a new bag of ice to keep items in the cooler cool. However, as the ice melted, it leaked through the cooler and onto the back seat of the car. We had to keep the cooler on a towel. We flew from NY to Utah. It was nice not to have to throw away a new cooler, but just fold the Mountainsmith up and pack it in the lugage.