By the time Wrigley began his business venture, Americans had grown accustomed to chewing gum sold as candy-coated balls or packaged sticks. The base of these chewing gums was made from natural ...

Some chewing gum also contains polyvinyl acetate, a polymer with elastic properties found in PVA glue, and butadiene-styrene rubber, found in car tyres. However, these ingredients are often listed ...