Accordingly the invention consists in a dispenser comprising a bag or sachet having {TAIL ~ a wall}, through which {HEAD ~ liquid} may pass, material within said bag or sachet being able to dissolve or be subjected to a leaching action in a selected liquid so as to release a selected material into said selected liquid 
through pass
Accordingly the invention consists in a dispenser comprising a bag or sachet having { TAIL ~ a wall } , through which { HEAD ~ liquid } may pass , material within said bag or sachet being able to dissolve or be subjected to a leaching action in a selected liquid so as to release a selected material into said selected liquid
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH REL OTH HEAD HEAD HEAD HEAD HEAD OTH REL 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