Sense Aroma are now selling aroma jewellery/ oil diffuser necklaces. They are stainless steel lockets, in multiple designs, interchangeable felt inserts so that the wearer can change the colour. You just have to pop a couple of drops of any oil of your choice onto the felt insert for your own personal aroma all day.
Sense Aroma are selling these necklaces for £9.99. They also sell a range of fragrance oils for £5.99, but the wearer can use any oils of their choice.