The Smelling Bottles are presented to the child to develops the sense of smell by matching different scents.  The set consists of twelve hollow wooden bottles and a coloured cap in Red & Green. There are 2 wooden trays with insets to hold the smelling bottles. Recommended to use only dry material, however U could dab a few drops of essential oils on a cotton ball & place them with care in the bottles with some sponge at the base for added support.