Not real liquid nitrogen, this is
DANGER! THIS IS A HAZARDOUS DEMO INTENDED FOR PHYSICS DEMONSTRATORS AND SCIENCE TEACHERS. IT HAS ALL THE SAFETY HAZARDS OF LIQUID NITROGEN. DEFINITELY NOT FOR KIDS!
INSTRUCTIONS:As shown in the video above, use scissors to remove the tops of both plastic bottles. Poke many holes in the bottom and sides of the smaller bottle only. Place the smaller bottle inside the larger. There should be at least a half-inch space between them.
Buy dry ice pellets. (These are the ones which look like half-inch rods,
or like "Cheetos.") If you can't find pellet-style dry ice, then instead
chop your dry ice into chunks. The chunks need to be small enough to
easily fit into the gap between the bottles. Make a couple of cups worth
of the chunks.
Hold the middle bottle in the center of the larger bottle, then distribute
the dry ice chunks
evenly around it. Keep the bottle centered, and fill the gap several
inches deep with chunks.
Slowly pour the 99% alcohol into the gap between bottles. It needs to
become chilled by running
over the dry ice. Lots of fog will form! Pour enough alcohol to make
an inches-deep pool in the center bottle. DON'T TOUCH IT. Unlike liquid
nitrogen, chilled alcohol freezes skin instantly on contact. To inspect
the depth, just blow the fog away.
The alcohol reaches its lowest temperature after the fog has cleared
and the dry ice is barely bubbling. It will become viscous; like light
syrup. (If you didn't use 99% alcohol, it will become very
Go find more Liquid Nitrogen demonstrations to perform! Some are listed below. Most of the ones based upon low temperature will work just fine. Of course the cold alcohol isn't creating nitrogen gas, so it cannot create fog clouds, explode a Pringles can, or glide across a warm surface. And because it's not making gas, it will cling to your skin and cause instant frostbite. Don't touch the stuff, and definitely don't spill it so it splashes. Treat it the same way you'd treat boiling water on the stove. There are many other safety hazards, but...
THIS IS A HAZARDOUS DEMO INTENDED FOR PHYSICS DEMONSTRATORS AND SCIENCE TEACHERS. IT HAS ALL THE SAFETY HAZARDS OF LIQUID NITROGEN. DEFINITELY NOT FOR KIDS!