In their Leonardo line, Ser Jacopo have recreated a design purportedly devised by Leonardo da Vinci himself by request of the King of France, Louis XII. One of a number of designs found within a trove of documents unearthed in 1982 by Professor Enrico Fabri, it described a twin walled clay pipe cooled with air circulating between said walls. Ser Jacopo's wall subs out clay for briar, but retains the twin wall design, with a perforated silver accent at the rim acting as a grill.