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Not a leech pot among them. These are all French - and the set of 44 did include the alcohol burner. Some date to the 1850s, some are as late as the 1920s. Sizes range from 4 to 9 cm - the latter were used for bloodletting rather than cupping. There is a wide range of mouths- most are folded outward (the simpelest way) or folded outward and angled. Some are also folded inward. The ones from the early 20th ct. tend to be mechanically made - like yoghurt pots. In another collection I have at least one star cut base, and several with a knop.