Historical clue formulations

• Baker's glassware brand — 2026-08-25
• Material for a baking vessel — 2018-01-20
• Measuring cup material — 2017-03-28
• Flask material — 2016-12-09
• Test tube material — 2015-10-31
• Beaker material — 2013-11-28
• Material for a baking dish — 2011-03-30
• Heat-resistant glass — 1998-08-25
• Beaker material — 1998-04-02
• Glass cookware brand — 1997-04-13
• Test-tube glass — 1996-10-04