The Thermos Freeze Board is a great way of keeping food and drink cool on a day out. Freeze it in the freezer and when you are about to go out, just pop one at the bottom of your cool bag or picnic hamper and you'll never have to eat a warm soggy sarnie again! A great alternative to traditional freezer ice packs. Features and Benefits Extra cold - Thermos Freeze Boards are a good way to maximise the cool-keeping ability of any cool box. Flat design - Ideal for putting at the bottom of cool boxes and picnic bags. Specifications Material: Tough polypropylene Heat-sealed leak-proof cap Non-toxic aqueous liquid