A radiation-shielding container for storing and transporting a radiopharmaceutical, said container comprising: a base comprising an elongate cylindrical base shield having an open end defining a base aperture and an opposed closed end, said base shield including an outer base shield surface and an inner base shield surface, said inner base shield surface defining a base cavity (116, 116a) in fluid communication with said base aperture; an outer cap comprising an elongate cylindrical wall having a first open end and an opposed closed end, said outer cap defining an outer cap cavity, said outer cap and said base further including cooperating mating components (180/182) to removably secure said outer cap to said base; an inner cap comprising an inner cap shield and a shield cover, said inner cap shield formed from a radiation-shielding material and including an elongate cylindrical inner shield wall having opposed first and second ends, said first end of said shield wall defining an inner cap shield aperture (120, 122) and said second end including a planar end wall spanning said cylindrical inner shield wall, said end wall including opposed first and second substantially planar surfaces, wherein said end wall defines at least one elongate open passageway opening on said first and second planar surfaces; wherein said inner cap and said base further include cooperating mating members (184/186) to removably secure said inner cap to said base such that said inner cap is positioned within said outer cap cavity when said outer cap and said inner cap are secured to said base; and wherein said outer cap further comprises a planar shielding substrate formed from a radiation-shielding material supported by said outer cap in overlying shielding registry with said at least one passageway of said inner cap shield when said outer cap and said inner cap are secured to said base. a base comprising an elongate cylindrical base shield having an open end defining a base aperture and an opposed closed end, said base shield including an outer base shield surface and an inner base shield surface, said inner base shield surface defining a base cavity (116, 116a) in fluid communication with said base aperture; an outer cap comprising an elongate cylindrical wall having a first open end and an opposed closed end, said outer cap defining an outer cap cavity, said outer cap and said base further including cooperating mating components (180/182) to removably secure said outer cap to said base; an inner cap comprising an inner cap shield and a shield cover, said inner cap shield formed from a radiation-shielding material and including an elongate cylindrical inner shield wall having opposed first and second ends, said first end of said shield wall defining an inner cap shield aperture (120, 122) and said second end including a planar end wall spanning said cylindrical inner shield wall, said end wall including opposed first and second substantially planar surfaces, wherein said end wall defines at least one elongate open passageway opening on said first and second planar surfaces; wherein said inner cap and said base further include cooperating mating members (184/186) to removably secure said inner cap to said base such that said inner cap is positioned within said outer cap cavity when said outer cap and said inner cap are secured to said base; and wherein said outer cap further comprises a planar shielding substrate formed from a radiation-shielding material supported by said outer cap in overlying shielding registry with said at least one passageway of said inner cap shield when said outer cap and said inner cap are secured to said base.