do phase change packs actually beat gel or is that marketing

phase change packs hold their temperature flat rather than sliding, which is the actual difference, could be misremembering

thats room air

powder survived

a cool bag with a phase change pack will hold for a day if you do not keep opening it, the door is always worse

scrolled past that, doorstep is the risk

a liquid cold pack tells you it was above freezing, not that your vial cooked, your fridge will differ