I picked up a light green bottle whose only markings are B. B. Co. , 16N, or possibly 15N, and 2 in different places around the very bottom of the base. The body very gently tapers up to the neck. I've searched Google, e-bay, etsy, and a couple other urls but can find no information. I first thought it may be Baltimore Bottling Co. but no joy. Any ideas from anyone?