Signature, also known as McDowell's Signature, is a brand of Indian whisky, manufactured by United Spirits Ltd (USL), a subsidiary of Diageo. It was launched in 1994.[2][3] Signature is a blend of imported Scotch whisky and locally produced products.[4] Signature is sold in octagonal bottles which were designed by London-based design firm Claessens International, who also designed the packaging of the bottle.[5] It is available in two variants – Signature Rare Aged and Signature Premier Grain.[4]