Evolution of a Bottle
The earliest known mention of China Glaze polish was in the January 1991 issue of Nails Magazine.
1995:
The caps from the very old standard-shaped bottles were very different:
The logos on the standard shaped bottles have also changed:
Some very old collections had differently shaped bottles as well, for instance the Classic Chromes collection:
Since the glue on the labels of these very old bottles doesn't seem to have held up very well, it's not uncommon to find them either missing labels or with the label stuck to the back of the polish instead of the bottom.
Some very old collections also had the collection name on the front of the bottle, whether in oval or round bottles:
Silver caps usually indicate a special collection like a holographic. Also, the Pure Platinum and Classic Chromes collections had silver caps.
Some newer, "special" polishes have the collection name on them. (Transitions, crackle, magnetic)