Historical clue formulations

• Square snack items — 2023-08-23
• They were once advertised with the slogan "Polly wants a cracker?" — 2023-04-16
• Soup accompaniers, often — 2016-08-14
• Soup accompaniers — 2007-01-21
• Premium product — 2006-01-13
• Soup crackers — 1998-10-12
• Soup crackers — 1996-12-23