encounter these sealed glass tubes, it is entirely natural to assume they have a practical, scientific purpose. After all, glass tubes and metal balls are staples in laboratories and pharmacies.
Here are the most common theories people have about their origins:
Agitating Capsules from Old Medicine Vials
In the early to mid-20th century, some liquid medicines or chemical solutions required thorough mixing before use. Small glass vials sometimes contained stainlesssteel or glass beads to help mix or homogenize liquid samples when shaken.
Vortex Mixers or Sample Agitator Tubes
In modern laboratories, small glass or plastic vials often contain a few
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