Aromatherapy oils ( Big range of pure Lotus brand product).
Made very well. Some product, though not passed as food grade, is made wihout artificial aromas and if used in drops can be added as a flavour.
Get a few drops into your way of allowing these essential oils into your air, which is usually a candle powered or an electric powered diffuser.
Add to carrier oils for massage too.
Even add a drop or two to your washing.