A container and method for filling same. The container includes a penetrable and resealable portion that is resealable, and a container body having a sealed empty chamber in fluid communication with the penetrable and resealable portion for receiving therein a substance. The resealable member may be dome-shaped or have a convex outer surface. A method of filling the container includes penetrating the penetrable and resealable portion with an injection member and introducing a substance into the chamber, withdrawing the injection member, and resealing the penetration hole in the resealable member made by the injection member during penetration.
