CU of bulky Exacto knife. A man’s hand picks it up and demonstrates with his finger that the tip is sharp. A can of Dupont’s anti-leak Zerex anti-freeze comes into view. The man punctures the can repeatedly with the knife. Each time, the liquid sprays out for a while and then stops itself. The product is shown in jug and can form with the tag line “Guaranteed not to run out on you.”