If you had to sum up the 1960s in one design: It would probably be the "Coke Bottle Shape". Initially used in military aircraft for performance reasons, the shape is characterised by a narrow waist and an accentuated hip that forms a gentle curve between the front and rear parts of the design object. The resulting line is reminiscent - as the name implies - of the bulbous and perhaps best-known lemonade bottle in the world. In the air, with an aerodynamic advantage around the speed of sound, the "Coke Bottle Shape" quickly became the standard on the road, too. Tail fins now gave way to narrow waists and flared hips on the rear wheel arches. At 100 miles per hour, the aerodynamic advantages were not as great as in aircraft construction, but the visual presence was modern and superior - making the cars particularly attractive. Our top five.