Not only are Aroma Beads (£30) bracelets made with mood-enhancing crystals, but they also contain a pumice bead into which you add a few drops of scented oil. The bead will retain scent for between 10-12 hours depending on the oil and can be topped up when it fades. The green aventine bracelet, shown here, is said to help dissolve away emotional negativity, perfect for when you've spent an entire day stressing over emails.