They might sell them at 'Body Shop' type places - people put stuff like lavender in them for putting in the bath. Two meshy things hinged together with a little latch, attached to a small chain or string. Probably called 'teabags'. (I only know 'cos we were given one with some lavender bath stuff a couple of years back for a Christmas present - you know the type of present - supposed to be a gift for you 'both' but its really for your wife - why don't you ever get given some tools or beer or brewing equipment or something like that for you 'both' ;-)