Quote from Kramer in The Voice
Jerry: Trouble down at the plant? Kramer: It's a drum of oil. Darin and I are finally going to test out my bladder system. George: You have to drink that whole thing? Kramer: No, no, no. It's for oil tankers. All I need to do is fill some sort of rubber container with oil and then drop it to see whether or not it can withstand the impact.