Company Names, addresses, dates¹:
  Nehi Bottling Co, 601-605 11th SW (1930-1932)
  Nehi Bottling Co, 1943 NY Ave NE (1936)
  Nehi Bottling Co, 1923 NY Ave NE (1937-1938)
  Royal Crown Bottling Co, 1923 NY Ave NE (1939-1942)
  Royal Crown Bottling Co, 1100 Jef. Davis Hwy, VA (1949-1959)
  Par-T-Pak Beverage Co, 1100 Jef. Davis Hwy, VA (1954-1958)
  Nehi Beverage Co, 1100 Jef. Davis Hwy, VA (1955-1959)
  RC Nehi Bottling Co, 1100 Jef. Davis Hwy, VA (1959)

Notes:
Wikipedia says this company started out in 1905, and has gone by many names including Nehi and Royal Crown Cola. It looks like the company had a presence in Washington DC from about 1930 to 1942. It seemed to open up again across the river in Arlington Virginia from 1949 to 1959. I assume "Par-T-Pak" was bottled by the same company, as it was at the same address during coinciding years.

Bottles:

(enlarge)	This was known as the "silk stocking bottle", referring to the fact that the texture resembled the weave of a silk stocking. This is an 8.5" clear crown top bottle embossed: front: NEHI / BEVERAGES / WASHINGTON, D.C. back: NEHI / REG US PAT OFF / NEHI BOTTLING CO side: MINIMUM / CONTENTS side: 7 FLUID / OUNCES bottom: DESIGN PAT'D MAR 3 25 / Duraglas
(enlarge)	This is a variation of the bottle above, in that it has an applied color label (ACL). It is a 9.5" clear crown top bottle with red on yellow markings: ACL front: NEHI / REG. U.S. PAT. OFF. / BEVERAGES / CONTENTS 12 FLU. OZS. ACL back: BOTTLE STERILIZED / BEFORE FILLING / ROYAL CROWN BOTTLING CO / WASHINGTON, D.C. embossed on bottom: DESIGN PAT'D MAR 3, 25 / Duraglass
(enlarge)	This is a 9.5" aqua crown top bottle with some embossed design, and red on yellow markings: ACL both shoulders: ROYAL CROWN ACL front: ROYAL CROWN / REG. U.S. PAT. OFF. / (picture of pyramids & star) / RC / COLA / COPYRIGHT 1936 NEHI CORPORATION CONTETNTS 12 FLUID OUNCES ACL back: BOTTLE STERILIZED / BEFORE FILLING / ROYAL CROWN BOTTLING CO / WASHINGTON, D.C.
(enlarge)	This is a 9.5" aqua crown top bottle with a red/yellow Applied Color Label (ACL): ACL both shoulders: ROYAL CROWN ACL front: ROYAL CROWN / (picture of star w/ "R") / RC / COLA / COPYRIGHT NEHI CORP ACL back: BOTTLE STERILIZED / BEFORE FILLING / CONTENTS 12 FLU. OZS / PROPERTY OF / ROYAL CROWN BOTTLING CO / WASHINGTON, D.C.

Enlarge	This is a wooden crate from the Royal Crown Cola bottling company of Washington DC.
Enlarge	This is a bottle cap. It is marked: NEHI BOTG. CO. INC / CONTAINS LESS THAN 1/10 of 1% BENZOATE OF SODA / ARTIFICIAL COLOR / 7 FL. OZ. / NEHI / ORANGE / A CARBONATED BEVERAGE / CONTAINS ORANGE JUICE AND / OIL, FRUIT ACID, SUGAR / AND WATER / WASHINGTON DC
Enlarge	This is another bottle cap. It is marked: NEHI BOTG. CO - WASHINGTON, D.C. / CONTENTS / 9 FL. OZ. / NEHI / REG. U.S. PAT. OFF. / ARTIFICIAL FLAVOR / AND COLOR / IMITATION STRAWBERRY SODA