Company Names, addresses, dates¹:
  Blair House Fine Soft Drinks, 500 Penn St NE (1966-1981)

Notes:
Blair House was a brand that was produced by the Rock Creek Ginger Ale Company ². Both Blair House and Rock Creek are listed separately in the city directories, but they were at the same address (500 Penn St NE).
The "Blair House" in Washington DC is a famous house where heads of states stay when they visit the President.



Bottles:

(enlarge)	This is a stipled, amber 9.75" crown-top bottle with a label: shoulder label: BLAIR HOUSE QUININE TONIC / IN THE BROWN BOTTLE / TO PROTECT THE DELICATE QUININE ESSENCES FROM LIGHT RAYS / TO SEAL IN THE FRESH BITTER-SWEET TANGY FLAVOR / NO DEPOSIT - NO RETURN main label: "IT'S CARBONATED" / Blair House / Caribe / QUININE / TONIC / REFRESHING AS A BEVERAGE / OR AS A MIXER / SPACE SAVER FULL QUART / Carbonated water, sugar, citric acid, lemon and lime oils, and quinine. / Blair House Beverages, Washington, D.C.
(enlarge)	This is a stipled, green 7" crown-top bottle embossed: front/back shoulders: 12 FL OZ / NO DEPOSIT front/back: BLAIR / HOUSE / FINE / SOFT DRINKS base: NOT TO BE REFILLED 3 GK-15361 5 67 Note that it doesn't actually say WASHINGTON DC, but the only "BLAIR HOUSE" bottling company I know of was the one at 500 Penn St NE, Washington DC.
(enlarge)	This is a stipled (but smooth in the middle), green 7" crown-top bottle embossed: front/back shoulders: 12 FL OZ / BLAIR HOUSE front heel: NO DEPOSIT front heel: NO RETURN base: NOT TO BE REFILLED 3 GK-15361 11 68 Note that it doesn't actually say WASHINGTON DC, but the only "BLAIR HOUSE" bottling company I know of was the one at 500 Penn St NE, Washington DC.

(enlarge)

This is a bottle cap marked: top: SELF MIXING / Blair / House / QUININE / TONIC edge: BLAIR HOUSE BEV CO WASH DC