I'll add,
if you can get solid blocks its should last longer than the 'blocks' you get at 7-11.
I like to use 1/2 or 1 gallon milk jugs I freeze myself with my filtered water. (not sure if that will be possible in AZ)
I have some 5 day coolers and can keep ice 4 days if properly packed.
on longer trips I bring 1 spare cooler full of ice and frozen bottles and reload the primary on 2nd day. that spare cooler becomes the trash can.
-Walt, can you feel the cold on the outside of the box? I'm also surprised the ice doesn't last longer. (can any more foam be added?) -do you have one of those thermal (IR thermometers?).
if you can get solid blocks its should last longer than the 'blocks' you get at 7-11.
I like to use 1/2 or 1 gallon milk jugs I freeze myself with my filtered water. (not sure if that will be possible in AZ)
I have some 5 day coolers and can keep ice 4 days if properly packed.
on longer trips I bring 1 spare cooler full of ice and frozen bottles and reload the primary on 2nd day. that spare cooler becomes the trash can.
-Walt, can you feel the cold on the outside of the box? I'm also surprised the ice doesn't last longer. (can any more foam be added?) -do you have one of those thermal (IR thermometers?).