a container for storing a sensitive or aggressive product is disclosed . the container comprises a hollow basic body made of natural glass . a plunger is arranged displaceably in the interior of the basic body . in order to seal the container so as to be diffusion - proof , the basic body is sealed at a distal out - let opening and at a proximal actuating opening by respective seals which can be removed and / or severed and are sealed in a materially bonded manner onto a supporting surface surrounding the particular opening . the seals can be sealed , in particular inductively , onto the respective supporting surfaces .