PERFECT FOR KIDS LUNCHES: Keep packed lunches cool with these cute reusable ice packs. The fun shape is sure to bring a smile to any child's face. The plastic used is lightweight and safe for food. SLIM DESIGN: The packs slip easily into a lunch box, cooler bag, lunch bag or picnic basket. Delivered in a set of 5, so you can use one or more at a time, and have backups stored in the freezer. COMPACT SIZE: Each pineapple pack measures 11 cm x 6.6 cm x 1.8 cm, making these cool packs a convenient size to use alone in a lunch bag, or in multiples for a cooler. COOL IN FREEZER: Place the ice packs in the freezer at -18C (0F) or colder for 24 hours. Make sure the packs are fully frozen before use. For best results, lay them flat inside the freezer. REUSABLE: Recharge the cool packs again and again for lunches, picnics, travel and camping. The packs keep food cold in temperatures from -18C to +40C.