Smokeless tobacco, also referred to as, dip, chew, spit, or snuff, is no exception
Chewing tobacco (North American, European), also known as chew (or in some Southern US dialects as chaw), is tobacco in the form of short or long, loose leaf and stem strands (like pipe tobacco or longer), or less commonly of grinded leaves and stems compressed into blocks called plugs, or even finely ground pieces compressed into pellets
Anti-smoking advocates said the higher age limit should make it more difficult for young people to get tobacco, particularly high school students who had friends or classmates over 18 buy for them.
Journal of the American Dental Association, 139(7):896-905