sealed by a glass cupping element which in this example is shaped as a half sphere 102 hereinafter u2014 u201c half sphere u201d for better orientation the end that comprises a half sphere is designated as the bottom the connection between a tube and a half sphere is performed by melting the glass while applying pressure on both parts one against the other as shown in fig2 a number of mcs can be attached and form an even larger storage system u2014 u201c multi multi capillary u201d mmc an mc or a group of mcs u2014 mmc are connected to an adaptor at the open top end of the capillaries u2014 a unit which allows the addition and release of a gas into and from each tube a valve can be provided in the adaptor or connected thereto to prevent gas from escaping from the storage fig2 shows an mmc 201 connected to an adaptor 202 the attachment of an mc or an mmc to an adaptor can be performed for example by a glue such as epoxy resin if necessary after the attachment of the adaptor to the mc mmc an additional sealing material can be used one example of a suitable adaptor is one that is made of stainless.