The secret to making the glitter float is to use dreamy, diaphanous, ultra-fine glitter -- which floats slowly to the ground when you shake the bottle. While it won't float indefinitely, ultra-fine glitter prolongs the magic.

How do you make glitter not sink in water?

Add a small amount of water and gently shake and swirl the bottle to help prevent the glitter from clumping. Add glycerine until the bottle is about one-quarter full. (Tip: if you're making a few bottles, you can use different amounts of glycerine in each one.

Why does my glitter float?

If your glitter all floats at the top, you don't have enough. If it all sinks to the bottom and doesn't want to move when you shake the jar, you have too much. To save water, start with a little and add until you're happy with the float of your glitter.