Diet Coke was the first new brand since 1886 to use the Coca-Cola trademark. It was not simply a sugar-free version of the original Coca-Cola; it was a completely different flavor formula based on the 'New Coke' recipe that was eventually released in 1985. The sweetener used was aspartame. Because Diet Coke lacks the density of the high-fructose corn syrup found in regular Coke, a curious physical phenomenon occurs: a can of Diet Coke will float in a tank of water, whereas a can of regular Coke will sink. This is because the sugar in regular Coke makes the liquid denser than water ($1.11$ g/ml vs $1.00$ g/ml), while the tiny amount of artificial sweetener in Diet Coke does not significantly change the water's density.