You can't just toss it in a trunk. It needs ventilation to prevent nitrogen displacement (asphyxiation). The Experiment
Mark stared at the silver dewar in his garage, feeling like a mad scientist. The question had nagged him for weeks: Is this actually legal? is it legal to buy liquid nitrogen
You must use a Dewar —a specialized vacuum flask. A standard cooler will shatter. You can't just toss it in a trunk