Bottle. Any container, irrespective of the material from which made, used for the sale of distilled spirits at retail.
27 CFR § 5.11
When used in this part and in forms prescribed under this part, where not otherwise distinctly expressed or manifestly incompatible with the intent thereof, terms shall have the meaning ascribed in this section. Any other term defined in the Federal Alcohol Administration Act and used in this part shall have the same meaning assigned to it by such Act.