Patent ID: 7934613

Claim:
A container unit for a drug, said container unit being composed in combination of a container, which is formed of a cylindrical drug-solution-containing portion and a drug-solution-filling neck portion, and a rubber closure for sealing said drug-solution- filling neck portion, wherein: said rubber closure comprises a disk-shaped head portion and a substantially cylindrical leg portion arranged on a lower wall of said head portion; said container is provided with a flat surface formed on a side of an inner wall thereof at a boundary between said drug-solution-containing portion and said drug-solution-filling neck portion such that a lower end wall of said leg portion of said rubber closure can be brought into close contact with said flat surface, and at least a side wall of said drug-solution-containing portion forms a flush, rounded surface on a side, where a drug solution is to be contained and also defines a cylindrical space of uniform diameter below said flat surface; and when said drug-solution-filling neck portion has been sealed with said rubber closure, said lower end wall of said leg portion and said flat surface of said container are maintained in close contact with each other without any protrusion of an inner circumferential edge of said lower end wall into an interior of said container beyond an inner circumferential edge of said flat surface, and wherein the substantially cylindrical leg portion of the rubber closure has a length L 1 , L 1 measured in a direction perpendicular to the flat surface, wherein a mouth portion of the container has a length L 2 , L 2 measured from a top surface of an opening of the container to the flat surface and in a direction perpendicular to the flat surface, and wherein L 1 >L 2 .