"how do you keep your jug/food from being spoiled in your tractor?"

It won't hold a jug, but Lexion has a good size "cubby hole" up top that is connected to the air duct of the heating/cooling system.    It holds about 4-5 cans of pop.   Will keep a frozen snickers bar frozen all day, but make sure to keep a mental note of when the hole has changed to a cooler to a heater..........Can make for a mess. Not sure why this low technology hasn't been adopted like most other high tech features of the combine has been over the years.

Thermos type containers don't seem to leak, but hold half of a conventional "jug".

Good luck