Glenmorangie uses a number of different cask types, with all products being matured in white oak casks which are manufactured from trees growing in Glenmorangie's own forest in the Ozark Mountains of Missouri, United States. These new casks are left to air for two years before being leased to distillers Jack Daniel's and Heaven Hill for them to mature bourbon in for four years. Glenmorangie then uses the barrels to mature their spirit. The "Original" range will mature entirely in ex-bourbon casks, while the "Extra Matured" range of bottlings are transferred into casks that were previously used to mature other products such as wine, port or sherry in a process called finishing. These form part of the regular range of products Glenmorangie makes. Glenmorangie also obtains small batches of other casks for finishing and release limited edition bottlings from these. Following acquisition by LVMH, Glenmorangie produced a rare limited edition aged in casks previously used to mature Château Margaux; these bottlings are now (2011) extremely hard to find and are priced accordingly.