I've used the Korda bag for around 3 months now and at this time of year you will only get 12 hours out of it before things start thawing out.
It will keep your food cold and fresh for 3 days but do not think for a minute it will keep stuff frozen because it won't.
I use two Icey tek freezer blocks and also a frozen bottle of water in the bag and none of them stay frozen over the 12 hours as I said before.
Friend of mine keeps his bait frozen for 48 hours by packing it tightly into a polystyrene box and then into an icey tek box and tapes up the lid.
Not sure if it was on the video but a couple of guys on Kevin Ellis last video were covering there boxes in a foil backed roof insulation material which really worked apparently so much so that Kevin is having bags made from a similar material that his cool boxes will sit inside of.
I saw photo of prototype yesterday and they look pretty good.

In reply to Post #32
Yep I've found similar results. Regarding the size it makes for a good bivvy table.

In reply to Post #32
Is the stuff called super 10? I lined a bivvy over wrap with that stuff
Based on space suits, works really well

In reply to Post #34
Not sure,I'll find out

Nash polar cool bag if you can find one,best I've used
Incidentally I freeze small cartons of custard much better than water or ice blocks and if I use bagged ice cubes from the supermarket I pour salt over it give it a shake as it makes it colder,don't ask me the science behind it but it works

In reply to Post #36
👍 that's what I use to take my bait abroad

In reply to Post #37
Anyone used the Speero cool bags

In reply to Post #38
Yes , I have the speero one that also takes your cooking gear . It's plenty good enough for my 48/72 hrs . As said with most other don't expect them to keep frozen all this time as they won't but a slow thaw does me . 👍