Capricious anomalies

Exploration Stage: Antique Store
From: Carlos Light
Description: To investigate the time phenomenon, we need to look for objects that clearly show the passage of time. In other words, not a table or a chair, but something like a glue that dries up over time or an ongoing chemical reaction that is visible. Take this flask, for example.
Completed: Look at the inside of this flask. There is a chemical reaction going on at great speed...too bad I can't remember the name of it. Either way, it is a chemical reaction that should have been over long ago. If you get close to this flask, you see, my watch stops.