Nonstick cooking spray is a product typically made from oil, water, and an emulsifier such as lecithin. It is used to coat pans and other cookware to prevent food from sticking during cooking. The most popular brand of nonstick cooking spray is PAM, which stands for 'Product of Arthur Meyerhoff.' PAM was first introduced in 1961 and has since become the leading brand of nonstick cooking spray.