Hey Ray! How To Use An Invisible Fire Extinguisher

PITTSBURGH (KDKA) — This is a fun experiment that is easy to do and requires very little set up. I like to call it the “Invisible Extinguisher,” since it puts a candle out by using what seems to be an empty glass.
Fire needs oxygen to be in contact with what it is burning. Plain old air.
When that oxygen is used by the flame, carbon dioxide is left behind.
No oxygen, no flame. Many fire extinguishers contain carbon dioxide to help extinguish fires.
Carbon dioxide is also a gas