A kit comprising - charge device comprising a set of one or more charge barrels, each charge barrel having a charge selected from the group consisting of a plunger, a stopper, a seal and a seal cap, wherein for each charge barrel: a. the charge barrel has an exit aperture and a flexible positioning means at the exit aperture, wherein the flexible positioning means is an incomplete hollow prism or cylinder having one or more holes or slots in a side wall, which serve as a venting means to provide a passage between the interior of the charge barrel and outside the charge barrel, and wherein the flexible positioning means is a narrowing of the charge barrel; b. the charge is located inside the charge barrel; c. the charge barrel is adapted and arranged so that the charge is able to exit the charge barrel via the exit aperture; - a receptacle device, the receptacle device comprising one or more receptacle barrels, each receptacle barrel having a receptacle located inside it; wherein each receptacle has an entry aperture; wherein each receptacle is suitable to receive a charge from a charge barrel through its entry aperture; wherein the flexible positioning means is adapted and arranged to position a charge barrel in relation to the receptacle barrel, so that a charge exiting the charge barrel is able to enter the receptacle barrel to close the receptacle; wherein the flexible positioning means has an exterior diameter which is smaller than an interior diameter of the receptable, so that the flexible positioning means can be inserted into the receptacle, and wherein the radius at the top end of the flexible positioning means is greater than the inner radius of the receptable, so that, if receptacle receives a charge from the charge barrel through its entry aperture, the top end of the flexible positioning means remains out-side the receptacle with a clearance of Δz, thereby providing an accessible channel for venting air from inside the positioning means. - charge device comprising a set of one or more charge barrels, each charge barrel having a charge selected from the group consisting of a plunger, a stopper, a seal and a seal cap, wherein for each charge barrel: a. the charge barrel has an exit aperture and a flexible positioning means at the exit aperture, wherein the flexible positioning means is an incomplete hollow prism or cylinder having one or more holes or slots in a side wall, which serve as a venting means to provide a passage between the interior of the charge barrel and outside the charge barrel, and wherein the flexible positioning means is a narrowing of the charge barrel; b. the charge is located inside the charge barrel; c. the charge barrel is adapted and arranged so that the charge is able to exit the charge barrel via the exit aperture; a. the charge barrel has an exit aperture and a flexible positioning means at the exit aperture, wherein the flexible positioning means is an incomplete hollow prism or cylinder having one or more holes or slots in a side wall, which serve as a venting means to provide a passage between the interior of the charge barrel and outside the charge barrel, and wherein the flexible positioning means is a narrowing of the charge barrel; b. the charge is located inside the charge barrel; c. the charge barrel is adapted and arranged so that the charge is able to exit the charge barrel via the exit aperture; - a receptacle device, the receptacle device comprising one or more receptacle barrels, each receptacle barrel having a receptacle located inside it; wherein each receptacle has an entry aperture; wherein each receptacle is suitable to receive a charge from a charge barrel through its entry aperture; wherein the flexible positioning means is adapted and arranged to position a charge barrel in relation to the receptacle barrel, so that a charge exiting the charge barrel is able to enter the receptacle barrel to close the receptacle; wherein the flexible positioning means has an exterior diameter which is smaller than an interior diameter of the receptable, so that the flexible positioning means can be inserted into the receptacle, and wherein the radius at the top end of the flexible positioning means is greater than the inner radius of the receptable, so that, if receptacle receives a charge from the charge barrel through its entry aperture, the top end of the flexible positioning means remains out-side the receptacle with a clearance of Δz, thereby providing an accessible channel for venting air from inside the positioning means. wherein each receptacle has an entry aperture; wherein each receptacle is suitable to receive a charge from a charge barrel through its entry aperture; wherein the flexible positioning means is adapted and arranged to position a charge barrel in relation to the receptacle barrel, so that a charge exiting the charge barrel is able to enter the receptacle barrel to close the receptacle; wherein the flexible positioning means has an exterior diameter which is smaller than an interior diameter of the receptable, so that the flexible positioning means can be inserted into the receptacle, and wherein the radius at the top end of the flexible positioning means is greater than the inner radius of the receptable, so that, if receptacle receives a charge from the charge barrel through its entry aperture, the top end of the flexible positioning means remains out-side the receptacle with a clearance of Δz, thereby providing an accessible channel for venting air from inside the positioning means.