I make a 90 mile trip to Costco abt once a month to
stock up on foods.... frozen foods mainly.

I tried using a medium size hard shell cooler to keep
the frozen foods in during the trip home, but it is a
pain in rear and just unworkable overall.

Now I'm looking for some really heavy duty insulated
grocery bags for this duty. Costco has some plastic
material ones that are plenty big but look like they
wont last more than a few trips.

Anyone have advice on some really tough bags?