In Car Oven
You thought having an in car soda fountain was amazing, that’ss nothing compared to the in car oven. Using the otherwise wasted heat generated by your cars engine, the in car oven cooks your food while you drive. It’s perfect for long road trips. Your kids will scream “Can we go to McDonald’s?”. Your strong willed response “No, I have an meat loaf in the oven. It will be finished by the time we reach mile marker 79.” Handling mess and clean up will have to involve some sort of in car dishwasher we haven’t developed yet. Note you must obey cooking while driving laws.