Historical clue formulations

• Like contact lenses for astigmatism — 2026-04-26
• Doughnut-shaped — 2020-09-15
• Like Life Savers — 2020-06-03
• Like an inner tube — 2019-08-07
• Doughnut-shaped — 2018-05-25
• Doughnutlike — 2016-07-29
• Like bagels — 2015-08-07
• Cheerio-shaped — 2014-07-09
• Life Saver-shaped — 2012-08-14
• Like Life Savers — 2011-08-26
• Inner tube-shaped — 2011-08-21
• Like a bagel — 2011-04-24
• Doughnut-shaped — 2009-05-05
• Like most washers — 2005-02-19
• Doughnut-shaped — 2001-07-31
• Like inner tubes — 2000-06-21
• Like Life Savers — 1999-07-04
• Ring-shaped — 1999-02-07
• Doughnut-shaped — 1998-01-14
• Doughnutlike — 1997-06-01
• Like an inner tube, geometrically — 1996-12-11
• Doughnut-shaped — 1996-07-03
• Doughnut-shaped — 1996-05-30