They’re also functional: As the cubes melt, they add hits of flavor, turning even a plain glass of water into an aromatic sip. The best part is that these cubes are a cinch to make, often ...

Purified municipal ice water in plain, lemon and lime flavor sells in four sealed trays of a dozen cubes for $5. It's about 10 cents a cube, but if you have to ask, have a cup of coffee instead.

Put a few ice cubes in the first glass of water. They float because ice is less dense than water. Search for a cube whose surface is at about water level.

Heavy water contains more deuterium than hydrogen atoms, making it so that the ice in your drink is heavier than the water, preventing your ice from floating.