A compressing means is preferable over even simpler direct compression of the compressible portion 20 by a user, as the compressing means may be adapted to provide a predetermined pressure force which is sufficient for closing {HEAD ~ the transfer path} 35 from {TAIL ~ the outside} 
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A compressing means is preferable over even simpler direct compression of the compressible portion 20 by a user , as the compressing means may be adapted to provide a predetermined pressure force which is sufficient for closing { HEAD ~ the transfer path } 35 from { TAIL ~ the outside }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL