Dream Soda is a 6 1/2 ounce bottle dated 1947 from the Brockway Glass Co.
Imperial is a 10 ounce bottle dated 1944 from Obear-Nester Glass co.
Imperial Club is a 10 ounce dated 1948 from Obear-Nester Glass Co.

I found a Herman Hoffmann had registered the Imperial Soda Water Co. in 1944 and the Dream Bottling Co. in 1947.
Both were bottled at the same plant, 3104 Page Avenue in St. Louis, Mo.

I believe the Dream was bottled in many other cities but am not sure. If anyone knows the franchise city, please let me know?
I'm thinking the Imperial was unique to St. Louis but am not positive. If anyone has seen this soda bottled elsewhere let me know?