Naugahyde. Naugahyde is an American brand of artificial leather. Naugahyde is a composite of a knit fabric backing and polyvinyl chloride plastic coating. It was developed by United States Rubber Company, and is now manufactured and sold by Uniroyal Engineered Products, LLC, a privately held company.
Diuretics are substances that make you pee more, they make your body lose water. Beverages containing alcohol and caffeine are sort of accidental diuretics - that is, they're not drunk with the purpose of losing water but it happens anyway. Then there are substance that are taken with the explicit purpose of losing water.
The authors concluded that if the men consumed caffeine-laced water after a two month period of abstinence from both coffee and tea, the volume of their urine increased by 50%, but when they drank coffee regularly again they became inured to its diuretic effects.