Pumping while traveling

What is the best way to keep breastmilk cold while traveling?? My family and I will be going on a five hour road trip and will be staying for 3 days, so I am wondering how can I keep all my milk cold on the drive? I will have 3 days worth of milk to store (about 60oz) on the drive back home, so would a cooler be the best option?? We won’t have a lot of space so I’m looking for something more compact and easy to carry