PIPET
| Date | Clue |
|---|---|
| 2026-01-04 | Chemistry lab dropper |
| 2023-12-31 | Lab tube with a bulb |
| 2022-06-26 | Lab dropper |
| 2021-02-26 | Lab tube |
| 2016-01-30 | Lab vessel |
| 2015-07-03 | Lab tube |
| 2013-03-31 | Chemical dropper |
| 2009-06-04 | Lab tube |
| 2005-08-07 | Lab tube |
| 2005-03-06 | Lab tube |
| 1995-03-26 | Lab tube |