vehicle preparedness kit for less than $10 per unit. Judiciously used, 4-6 pints (2-3 QT) of isopropyl alcohol will keep a car warm between 60° - 70° for approximately 24 hours. Click the link below to download a 4-page instructional PDF with clickable links. [insert link here] BILL OF MATERIALS •CLEAN QUART PAINT CAN & LID1 •ROLL TOILET TISSUE1 •QUART BOTTLE ISOPROPYL ALCOHOL1 •BUTANE LIGHTER1 •PAINT CAN OPENER1 •DUCT TAPE (8 INCHES)1 •OPTIONAL CLEAN 1 GAL PAINT CAN LID1 ... EmergencyHeater 960 ...