It looks to me a perfume pen ;you turn same as pen but when putting together"the long fibre piece is wick and gets sealed in the longest part BEFORE end capping .the small piece fits the end and the lid and end are screw assembly the top is capped. To use unscrew and there should be plastic syphon thing. Use this to syphon perfume put into wick after removing end (the small white piece) .then ready and the perfume is drawn up the wick . Use as required. The o ring is seal on screw section . Hope this helps.....