flicking the wrist so that one's index finger taps the top of the can. Unlike snus, which is most often placed between the upper lip and gum, moist tobacco users or "dippers" tend to use the lower. Dipping in the upper lip is unusual, though when done, it is colloquially termed an "upper decker" or "top lip dip". The dip rests on the inside lining of the mouth for a period depending upon the user's preference—often 20–40 minutes. Nicotine and other alkaloids found in tobacco are absorbed in saliva sublabially by the inferior or superior labial arteries. Buccal and sublingual absorption may also occur. Also unlike snus, dip often causes the user to produce excess saliva during the act of dipping. This is typically spit onto the ground or in a container, because swallowing the saliva-tobacco mixture can cause irritation to the esophagus and induce nausea and vomiting. A spittoon can be used, but often users will simply use an empty plastic bottle or a "mudjug," a portable spittoon. Smokeless tobacco is sometimes used in the workplace by employees, especially if the employer does not provide many cigarette breaks or if the employee is consistently using both hands during work (which doesn't provide opportunities for cigarette smoking). Smokeless tobacco is popular in many industrial areas where there is a safety risk in having an open flame, such as oil rigs or refineries. Etymology and terminology Dipping tobacco was first popularized and marketed as moist snuff in the 1800s. The term "snuff" in this context is an English cognate of the aforementioned "snus", from Swedish. Dipping tobacco's Scandinavian roots impart a noticeable legacy on modern American brands such as Copenhagen and Skoal (referring to the interlinguistic term skål, which in Danish, Norwegian, Icelandic, Faroese and Swedish roughly translates to "cheers", implying a toast). A user of dipping tobacco will produce an excess amount of saliva which will be disposed of using a "spitter." A spitter can be an empty bottle, cup or commercially produced spittoon. Dipping tobacco use is often accompanied by first drinking a liquid, in some areas known as a primer, catalyst, and rinser. A primer is used to initially salivate the mouth, usually during a meal, in order to prepare the mouth to use smokeless tobacco. This is important because a dry mouth or one full of food could lead to a less enjoyable experience for the user.