of them are ceramic, however: a ceramic skull mug (for hot buttered rum and Coffee Grog), and a scorpion bowl, kava bowl, and a tall Fog Cutter mug all depicting islands scenes with native women. As the use of ceramic mugs started to expand many remained fairly basic, such as plain ceramic coconut shells or miniature rum barrels, but mugs became more stylized and some began to bear the name of the tiki bar that served them. Those in the shape of Easter Island statues (moai) are among the most common, fueled in large part by the popularity of Thor Heyerdahl's 1947 Kon-Tiki expedition and 1957 Aku-Aku novel. Steven Crane is largely credited with making "real tiki" carvings a major design theme in south seas inspired restaurants. The origin of who created and what was the first true tiki-shaped mug is frequently debated and has not been decided. While some tiki mugs were meant to be close to accurate renditions of actual tiki carvings, regardless of whether such tikis were Polynesian, many also were simply aesthetic estimations meant to evoke a tiki image to mainland American consumers who would not know the difference. Asian themed mugs grew in popularity as well, depicting monikers for drinks such as the Karate Punch or Sumo Flip. Some mugs also became eponymous with the drinks they were served with and vice versa (examples including the Suffering Bastard, scorpion bowl, and Fu Manchu). The 1960s saw the ceramic craft market, such as Holland Mold Inc., release tiki mug molds for the hobbyist to make and customize at home. Vintage mugs, whether made by a professional manufacturer or by hobbyists, were once found in abundance on the shelves of junk shops in the 1980s and 1990s but became a sought-after item for those who were responsible for the revival of interest from tiki's heyday. Such historical mugs were first systemically catalogued in 2003 by Duke Carter in a self-published book that was considered important to the renaissance of tiki culture. Some tiki mugs have become quite valuable, with one estimation of a single mug's worth in 2019 for the Parksmith Fertility Goddess Decanter coming in at over $5,000. Sizes Although some mugs can be quite big, larger vessels are required for drinks meant to be shared. A scorpion bowl (also known as a kava bowl or tarantula bowl) is an oversized ceramic bowl meant for communal