Um... beer?
Phial
Flacon
Usually it was held in a small glass bottle. Or sometimes there was a small compartment in the desk that you could put the glass bottle in and then it held the ink.
A scent bottle is a flacon, the root of the word is French
Put them in the freezer overnight. The next day lower the large bottle in very warm water without allowing warm water to contact the small bottle. The overnight cold will contract the small bottle and the warmth will expand the large bottle. They may be easy to separate that way.
Star Tonight - 1955 A Small Glass Bottle 2-41 was released on: USA: 7 June 1956
I think you might be looking for cruet.
A phial (vial in the US) may be what you are after.
An ampoule is a small glass bottle or container containing a solution suitable for injection.
It is called a cruet.
To create an ecosystem in a bottle, start with a clear glass or plastic container with a lid. Layer small stones or gravel at the bottom for drainage, followed by activated charcoal to filter the water, and then add a layer of potting soil. Plant small, hardy plants like moss or ferns, and add a small amount of water. Seal the bottle to create a self-sustaining environment, placing it in indirect sunlight to avoid overheating.
It floats because the water is heaver then the bottle. The bottle is light so it floats. No,It floats because the particles are free to move inside but with water in it there is not enough space for the particles to move so it floats.