Reusable cooling packs for the Catit PIXI Smart Feeder with 6 meals. Place them in the freezer overnight. Simply put the Catit PIXI cooling packs in the freezer overnight or until they are completely frozen, which takes about 12 hours at temperatures between -4 to -24 degrees Celsius. This keeps your cat's food fresh for longer. Place the Catit PIXI cooling packs in the designated spot under the feeding bowl of the Catit PIXI Smart Feeder with 6 meals. This way, the cat food inside stays cooler and fresher for longer. Please ensure that the feeder is not placed on a heated floor when using the cooling packs.