Chewing tobacco is a type of smokeless tobacco product consumed by placing a portion of the tobacco between the cheek and gum or upper lip teeth and chewing. Unlike dipping tobacco, it is not ground and must be manually crushed with the teeth to release flavor and nicotine. Unwanted juices are then expectorated. Chewing tobacco is typically manufactured as several varieties of product most often as loose leaf, pellets, and "plug". Nearly all modern chewing tobaccos are produced via a process of leaf curing, cutting, fermentation and processing or sweetening. Historically, many American chewing tobacco brands were made with cigar clippings.