if i have a regular bag and cut out some pieces from a car windshield
sunshade and put them in there that should be as efficient as a real
climate control bag wouldnt you think? or am i missing something?
No climate control bag is going to keep temperature down when summer down here reaches 100ºF+ w/ Heat Index of +10ºF with high humidity, eventually the temperature will even out inside the bag. If you want to keep food or beverages insulated, a lunch box type or small cooler bag works way better and you can stash inside a cold pack to keep fruit cool.