Boston Round Bottles, another name for dropper bottles’ iconic shape, are commonplace blue-colored bottles that are used heavily within the pharmaceutical and drink industry. They got their name from their shape at the turn of the 20th century; round bottles had much more inherent strength than any other bottle. There’s no real reason how Boston got into the name as they were also called Winchester quart bottles, which were also commonplace around 1860. They were primarily made with amber-colored glass, but as time went on, more colors started to arise, protecting different levels of UV rays.