Our coolers don't keep food cold enough for as long as we'd like. While the
  body has insulation, the lids do not. I began searching for an upgrade.
  When it comes to coolers and cold boxes, it seems there are only two options:
  1. Fairly cheap eskies with minimal insulation in the lid and body that
  only keep food cold for a day or less.
  2. Expensive chilly bins that are heavily insulated, bear-proof, and
  keep food cold for almost a week.
  While I value quality, I don't want to spend hundreds of dollars just to keep
  food cold for a few weekends a year. Additionally, I'm struggling to find a
  well-insulated cooler in the compact size of our favorite Playmate cooler.
  Wondering if you can insulate a Playmate cooler to match the performance of a
  Yeti cooler? Yes you can! Not only that, but your DIY Yeti cooler will also
  weigh much less when it is empty.
Here's how to do it.
How to Hack a Cooler to Make it Colder
  
  Save this cheap and easy tutorial to your Pinterest Boards for later! Share it
  with your friends!