How do you make glass float?

The float has air in it.

It depends on the float. But all you do is take Vanilla Bean Ice cream put it in the botton of a cup(1 or 2 scoops is fine) then you add the soda you want the float to be...so if u want a rootbeer...

Chemically, most glasses are silicates. Fused silica by itself makes a good glass, but its high melting point (1723°C or 3133°F) and its high viscosity in the liquid state make it difficult to melt...

superheated sand

Glass Ingredient - I believe the main ingredent is quartz. Answer: No, its not made out of quartz at all; it is made from melting sand at extremely high temperatures. Clarification: The second answer...