Dry Ice-ISO Cooling Bath Temperature Test
Video showing that you can use 70% Isopropyl Rubbing Alcohol available at most any consumer store to make a cooling bath that can reach temperatures as low as -50 degrees Fahrenheit. All you need to do is get dry ice, crush it down into small pieces, add your ISO while stirring so that you get a slurry of dry ice and ISO at the end.
USE CAUTION WHEN HANDLING DRY ICE. MOST DRY ICE WILL BE AROUND -78F TO -109F AS SOLID CO2; COLD ENOUGH TO CAUSE FROSTBITE WITHIN A SECOND OR TWO!
70% ISOPROPYL ALCOHOL IS FLAMMABLE, USE WITH CAUTION! NO OPEN FLAMES, SPARKS, SMOKING, OPEN COIL FANS OR ELECTRICAL HEATING DEVICES SHOULD BE IN USE NEAR THE AREA.