Abstract: A diffuser 1 for diffusing essential oil into a room using steam comprising a housing 2, a liquid container 6 in the housing, a heater 11 for heating the liquids in the container 6 to vaporize it, and a support 5 for holding volatilizable-substance matter 20 above the liquid container. For convenience, the volatilizable-substance matter 20 is in the form of an aroma packet, having upper 22 and lower 23 cellulose tissue webs, holding between them some dried plant material, for example lavender blooms. The webs are sealed together at their edges by a rim, which is sized to fit the support of the diffuser.

Abstract: A hose has an inner wall 1 of blow moulded tube and an outer wall 2 of continuous, spirally formed, corrugated tube. At each end of the hose, the inner wall extends further than the outer wall. The walls are separated by a rigid spacer 3 inserted into the end of the outer tube. The walls are united to a moulded connection member 4. This arrangement has a relatively long spigot 5 which extends from a cavity 6. The inner wall is slid onto the spigot as far as the bottom 8 of the cavity. A radially parting mould is placed around the connection member at a nose 9, within which the cavity extends. The mould has an aperture for the outer wall. On injection of material into the mould, the moulding 7 is formed in the cavity 6, along the extent of the inner wall on the spigot 5 as far as the spacer 3 and past the end 10 of this along an end portion 11 of the outer wall. The mould forms the outer diameter of the moulding to the dimension of the nose 9 and limits it from extending along the outside of the outer wall.