This twin pack of freezer blocks contains two re-usable slimline plastic blocks that are pre-filled with water so that they can be frozen and used time and again in cool boxes and lunch bags. They\'re even on hand and ready for medical mishaps, or any occasion where you might need ice. Twin pack freezer blockFilled with waterReusableSlimline; don\'t take up much spaceSize: 16.5cm (H) x 10cm (W) x 1.8cm (D) Available in yellow and aqua blue (please note that colours will be chosen at random unless specified at checkout)