I can no longer afford the latest high-$$$ coolers like the Yeti or Cabella. I have a 5 day Rubicon Trail trip starting in less than 2 weeks and will be using my trusty 30 year old Coleman eXtreme chest. It really keeps things cold in hot climates so long as it has a big block of ice in the middle.
But I'll be adding to its insulation before leaving with the below. I'll drill 12-15 holes all over the inside and inject this expanding foam into each hole. It'll expand throughout the inside and eventually expand out the drilled holes. 10 hours later a razor blade will be used to trim the overflow off.
There are several YouTube videos on doing this where I got the idea. The Rubicon trip will be a good test.
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