Accordingly the invention consists in {HEAD ~ a dispenser} comprising {TAIL ~ a bag} or sachet having a wall, through which 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 
comprising
Accordingly the invention consists in { HEAD ~ a dispenser } comprising { TAIL ~ a bag } or sachet having a wall , through which 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 HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH OTH