Liquid nitrogen is cold! So, they use it to make ice cream to order. You pick the flavor and the additives. They make it while you wait. I watched. The real show is in the “making.” Wow! Is it cost efficient? Better? What? I don’t know. The show was worth the price?! It was chilly in sunny Southern California. But we were having ice cream no matter what.
The heater was optional but much appreciated.