Medical supply kit
Visually similar in appearance to a doctor's bag but is contaminated. With 35 Medicine, you can sterilize it with a bottle of either whiskey, Scotch, or vodka (all of which can be found in a nearby fridge). Otherwise, you can replace the contaminated parts with one bottle of turpentine and one roll of duct tape, salvage it, or take it with you and sterilize it at a campfire. Note that salvaging the parts will give you less XP for the quest Tourist Trap than the other options.
It can be found on the table on the left, located in the back area of Zion Ranger Station.