I've decided to be vegetarian, and curry items made by Indian and Thai restaurants are my favorite and will make this transition easy. I don't need the meat to love the flavor and especially Indians have a lot of vegetarian items. Ok, too much info, but my chooler is 3 degrees ambient temp. So if it is 80 degrees inside my truck, it's only 50 ib v the cooler. How well, and how long would these foods keep in that temp? If I buy say once per week, would I be ok?