I had frozen delivered from them before. It was a lot of food though. I weighed it out dry ice left over at about 380 grams. It took 15 hrs +/- to be shipped in the summer. There is a chance it still could be. As long as the top isn't opened up it doesn't turn into gas as fast. The insides of the cooler get so cold it slows the rate it turns into gas phase. Plus I think maybe its refrigerated in storage before being put on truck. These were in a pretty thick foam cooler, in a box taped up, but not completely sealed. Even just regular ice I've had last over 2 days in a cheap cooler outside about 70 degree days. How much food was it? If something happens I would think they will help.