Canvas Series 48 Pack Cooler

I highly recommend this cooler to any parents looking to travel with frozen breastmilk. Using the 48 pack size I was able to travel internationally with just over 700 ounces and everything remained frozen solid for almost 30 hours. I’m confident it would’ve stayed frozen even longer but we’d reached our destination.Some additional details that may help:The instructions tell you to put something inside the cooler to chill it first, I just stuffed the entire cooler into a deep freezer overnight to ensure it was chilled as possible.I was able to fit nine “bricks” (using gallon sized zip-loc bags) of frozen milk. Six were standing upright and side by side at the bottom. The second layer was three bricks laying on their side on top of those (it would not zip if the second tier was standing upright). There wasn’t enough room to lay another three on their side so I filled that space with loose milk bags. I made sure all the bricks were unzipped and compressed to reduce trapping any warm or room temp air inside.I placed two of the large blue ice packs visible in the pictures on the short sides of the cooler and also laid two on top. I finished it out with the silver ice pack sheet laid across everything.Once zipped and sealed I did not open the bag again until reaching our home and opening to put everything in the freezer. Resist the urge to open at the airport at baggage claim to check— unless you’ve got a short ride home, we didn’t!The pictures may look like I had lots of room left but that because the sides fold over once zipped. I left no space because I didn’t want to leave room for any excess air.Once zipped up I taped over all the zippers to reduce the chances of any warm air seeping in or cold air getting out. I also printed signs for each side stating what was inside and asking for the bag not to be opened (I was hoping TSA would only X-ray the bag if concerned). We didn’t have any issues.I checked this bag (it was about 48 pounds and also way too large in dimensions to be carried on) and had no issues at all. It was still fully sealed upon arrival. I do think it’s important to note that I flew in December and my departure and arrival destinations had temperatures in the 40 and 30 degree (Fahrenheit) ranges. Although, I will say that this was a good enough experience that I will be trying this again this summer during peak heat times.I had a really hard time finding recommendations for the best cooler to use to travel with frozen breastmilk. This cooler was amazing and the price point can’t be beat for the size. I hope this helpful to other parents in the same situation. Best of luck!