Science Facts: Coke Floats

A can of standard Coca-Cola has a density of 1.042 g/mL, but a can of Diet Coke has a density of just 0.997 g/mL. While it's not a big difference, water's standard density is 1 g/mL, resulting in Diet Coke floating while regular Coke will sink. If you want to get rid of all your non-diet drinks without having to look at each individual can, empty your fridge into a large body of water and collect any cans that float.