Originally Posted by
tornado60
My main concern is that at times it might have to survive a couple hours on my bike in hot weather.
Couple of hours? How long does it take you to ride into work (and how late do you start work?)
Sometimes I bring leftovers for lunch, and I intentionally leave them out on my desk all morning so when I nukrowave them for lunch it's quicker. Never gotten sick.
Heard a good perspective on food safety once from Alton Brown. Bottom line, cooked food is a lot hardier than raw food.