Originally Posted by
604ksmith
I have two Coleman Marine extreme 6 day coolers - 150 quart. By themselves they are suprisingly good. My DIY modifications to get them ever better are:
- Velcro "latches" to keep the cooler lid tight
- Reflectix outside cover (all 4 sides)
- Heavy wool blanket draped over to keep out of direct sunlight (even if they physically sit in direct sunlight)
Doing this, I'm able to keep block ice in my cooler for days. Most recently, I left one of the coolers in my truck canopy on opening weekend for 4 days in 30-35 degree heat and came back to 80% ice.