Capacity/size: 330 milliliters of sealed cooling gel or water-based coolant
Function: Freezes into a solid block and slowly releases cold to keep food and drinks chilled
Material: Usually made from durable, food-safe plastic (HDPE or similar) filled with non-toxic cooling gel or purified water
Shape: Compact rectangular or flat brick for easy stacking
Reusable: Can be refrozen multiple times after use
Usage: Ideal for lunch boxes, picnic bags, medical transport, camping, and small coolers