In your previous comment, perhaps you meant to type keystone symbol with a K in it and not J. You might clarify this.
But even if we do clarify where the bottle was manufactured, that says nothing about what it was used for. Some companies produce bottles, other companies buy them to use for their products. Rarely, if ever, are they one and the same.
With the absence of any embossing, you are left to find labeled examples to get the answer. However, in the case of your bottle, it is so plain that surely this was used for a variety of products.
