It has been innovative in the use of yeast strains as well as peating the water, not just the barley used in production. Now recognised particularly for its 100 Pipers bottling, in the 1970s Glen Keith produced Craigduff and Glenisla; two unique single malts never released by the owners but can be found bottled independently by Signatory. Glen Keith has recently been refurbished and expanded with a capacity of 6 million litres a year. Chivas Brothers are intending to use almost all of its spirit for blending. In the past, the distillery has been a site of experimentation.