The first American bottles to gain favor with collectors and museums were whiskey flasks made between 1750 and 1860. Most of them were pint-size and were made by a pattern or mold-blown method. They had impressed or raised decorations on the glass. Blown bottles varied in size and consumers worried they might be getting less whiskey in some bottles. Factories developed molds that shaped bottles of the same size like the historic flasks.
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