Hand blown 24% lead crystal Double Bubble scent ball produced in Scotland. This item consists of a bubble within a bubble - hence the name. The inner bubble is open at the top - add a few drops of fragrance or aromatherapy oil and hang the Double Bubble in a sunny window. The heat from the sun will evaporate the oil and fragrance your room. All Double Bubbles are individual - no two are the same. Various colours available - contact us if you have a preference, otherwise a random selection will be sent.