These convenient cans of aerosolized oil can be sprayed in a fine mist for even distribution. Most cooking sprays consist of the oil itself (canola, vegetable, or olive oil) with additives and propellants. Cooking sprays provide a way to grease your cookware or bakeware without adding extra calories.
Use a paper towel to apply a thin coat of vegetable oil to your cookware. You can also buy special oil-mister spray bottles, which you fill with the oil of your choice, that can create the same fine spray but without the added chemicals.