I put a Fiskars shovel in my car. A folding shovel and some blankets are standard kit. Food goes in my backpack. That way I can be fairly sure that my water actually is a liquid. I also have a small Trangia cooker with fuel and a few tea bags and packets of instant coffee as comfort items.
I also put lock defroster in an inner pocket of my motorcycle jacket. It might be required to shut down the engine and - equally important - get the key out of the ignition lock after the ride.