A practical way to store our food
Most everyone hates washing the dishes. And, sometimes, a dishwasher is not an option. When we cook, we usually leave millions of dirty dishes, pots and pans and utensils (not to mention countertops) that need to be scrubbed. This is probably a smart way to avoid that.
They ate noodles but in order to avoid using containers, this husband decided to put the leftovers in the tomato sauce jar. Then, all he had to do was heat the food in the same container and eat it. Practical and environmentally friendly.