Historical clue formulations

• Unit of engine capacity — 2025-08-19
• 20,000 drops, pharmaceutically — 2023-04-23
• Volume measure — 2021-11-19
• About two-thirds of a 7-Eleven Double Gulp — 2021-05-29
• One of about five of blood in the average adult body — 2021-05-13
• One of three in a double magnum bottle — 2020-10-08
• Engine capacity unit — 2020-01-23
• Soda bottle unit — 2018-05-16
• Soda bottle measure — 2017-07-31
• Engine capacity unit — 2017-05-09
• Engine displacement unit — 2015-11-13
• Soda bottle size — 2015-03-31
• Engine measure — 2014-05-30
• Soda bottle measure — 2014-04-16
• Bottle unit — 2013-07-14
• Gas unit — 2012-03-30
• Soda bottle unit — 2011-04-11
• Wine order — 2010-08-29
• About 33.8 fluid ounces — 2009-12-19
• Cubic decimeter — 2008-07-13
• Water bottle capacity — 2006-04-26
• Midsized soda bottle — 2006-03-01
• Engine unit — 2005-11-02
• Engine unit — 2005-10-08
• Soda bottle unit — 2005-05-09
• Carafe size — 2005-02-07
• Soda pop purchase — 2004-07-24
• Pepsi bottle amount — 2004-06-01
• Carafe size — 2000-03-24
• Coke bottle size — 1999-12-13
• Bottle capacity — 1999-01-12
• Measure of 30-Down — 1998-11-07
• Two-thirds of a magnum — 1998-05-23
• Bottle size — 1997-12-17
• Carafe quantity — 1997-04-23
• Pepsi bottle size — 1997-02-03
• Bottle size — 1996-08-04
• Bottle capacity — 1996-02-07
• Bottle size — 1994-10-14