Historical clue formulations

• Absorbent — 2026-09-13
• Spongelike — 2021-07-18
• Not watertight — 2020-05-23
• Like tea bags — 2016-05-07
• Permeable — 2016-04-25
• Like Swiss cheese — 2006-04-22
• Leaky — 1999-09-26
• Insubstantial — 1994-01-21