Here is a nasty crude small Hostetters Stomach Bitters which was recovered from the Earth in the past few weeks. These are about as crude a bottle as you can find, and each one is different. They range in color from pure black which one cannot see through, to a forest green. The lip, and panels are often so poorly made (thankfully!) that you wonder about the quality control on these early bitters. Every one I have seen is this way, and like the typical "black" ales and cylinders found throughout the West, each is unique. I cannot help but wonder if they were made by the same glasshouses which made these "blacks". The color, crudity, and high iron content of the glass is so similar.