Fruit juice and milk will go bad, but water won't. Bread doesn't need to be refrigerated. It's mostly dairy products that need refrigeration. Cheese slices won't go bad, at least not right away, but they will melt in the summer if not kept cool. Mayonaise turns into a yellowish margarine-like substance if not kept cold.

Fridges should be spherical, with lots of insulation, or maybe a vacuum thermos design, or at least argon gas. The radiator grill should have a water cooling system that carries heat down the drain so the air conditioner doesn't have to do more work to keep the house cool. Lots of innovation is still possible.