Description Our range of Hot & Cold packs are so handy for picnics and packed lunches, keeping food either hot or cold. They can also be used as pain relief or to reduce swelling, simply wrap in a towel before applying to the affected area.  Our Hot & Cold packs are under 100ml, so you can carry them in your hand luggage when travelling abroad! Product Details Length: 11.5 cm Width: 7 cm To keep food cold: Freeze for at least 1 hour for a cold pack that will last 40 minutes To keep food warm: Place in hot (not boiling) water for 10 minutes for a hot pack that will last 30 minutes Comes in 2 fun designs - Elephant and Monster Caution: Not for children under 3 years of age, for external use only