Company Names, addresses, dates1:
Whitney & Landers, 576 7th W (1869)
Whitney & Landers, 208 7th (1870-1871)
M.M. Whitney, 208 7th SW (1872-1879)
I beleive this was Moses M Whitney (b. 1839 in New York), and his partner was D.E. Landers (b. 1835 in NY). The latter was listed as a manufacturer of Mineral water in the 1870 census.
book # 721
This is 2 photos of the same bottle, one before cleaning (with the embossing painted), and one after cleaning. It is a 7.3" aqua, gravitating stopper bottle with part of the stopper still inside. It's embossed:
front: M.M. WHITNEY & CO / WASHINGTON, D.C.