1️⃣ Mixing / Agitation Ampoules
The small ball bearings act as agitators. When the tube is shaken, the balls help mix whatever substance is inside more thoroughly. Similar designs are used in:
Nail polish bottles
Paint markers
Adhesive activators
Resin or chemical sample kits
However, in your case the tubes appear empty except for the balls, which suggests they may be refillable or intended for insertion into another product.
2️⃣ Craft or DIY Inserts
These are sometimes sold as:
Mini rattle inserts for crafts
Sound-making inserts for handmade toys (though glass is less common for children’s use)
Jewelry or art components
The tiny ball bearings create a subtle shaking or rattling sound.
3️⃣ Industrial / Laboratory Components
Small sealed glass tubes with metal balls are sometimes used in:
Chemical testing kits
Calibration tools
Specialty adhesives or repair kits
If ordered accidentally (or sent in error), they may have been part of a bulk supply for hobbyists or lab use.
⚠️ Important: If You Didn’t.....
