Very easy to make, simply tear the top perforation, and pour in water directly from the tap, or from a jug if you want to add flavour, tie the bag, then pop into the freezer. Extremely easy to store compared to ice cube trays and moulds, the whole bag is only a couple of millimetres thick. Going on a self catering holiday? Pop these in your suitcase and you can make when you get there, they can also be used as an ice pack. Pack of 1228 cubes per bageasy fill and tie openingmaterial ldpeapproximate measurements per bag 38.5cm x 17cm