These are just fantastic for making fun pendants.
You have 100 glass vial bottles with caps, they can be reused over and over because the caps can be put on and taken off with ease but if you wish the cap to remain on forever simply place a small amount of superglue to the edge of the cap before plugging the bottle.
The bottle is suitable for crystals, locks of hair and even liquids. Many people turn them into spell bottle pendants and add a little written spell, oil and herbs etc
The top does have a hole making it very easy to thread a cord or attach a chain.
The opening is approx 6mm and the bottle measures 40mm long x 10mm wide