The Vat of Fat consists of a plastic jar containing approximately 450g of gooey simulated fat, which represents the amount of weight a person would gain in 1 week if he or she consumed an extra 500 calories each day.
The information on the back of the jar shows how much weight a person could gain in 1 year as a result of getting extra calories. The Vat of Fat is a shocking but effective tool for health educators to explain how excess calorie intake translates into weight gain.