The Sensory Sensations Spiral Drip Timer has a circular ramp that the coloured oil drips wind down as they flow through the liquid. Calming and mesmerising. Height: 15cm. The colours of the liquid come in Pink or Blue. Minimum order for retailers is 6 pieces. Warning: These products are made from acrylic plastic. They will not withstand being thrown or dropped onto hard surfaces. They contain mineral oils which may smell strongly if the product breaks. The contents are not toxic and are approved to Australian safety standards, however please under supervision to ensure safe use of the product.