Can anyone recommend an alternative to aussie gel packs to go inside a large icey tek? I have 2 and they are brilliant but I need some more. I ordered them from Cool Boxes Uk but they are out of stock at the moment and we go away next week. There are lots of ice packs available on the internet but I have no way of knowing how effective they are. I have various old-style ice blocks but they don't keep frozen as long as the aussie gel packs. Bags of ice not an option where we will be camping.
Any advice very gratefully received. [desperate emoticon]