Designed to elegantly store your spheres of crystal clear ice, the Polar Ice Tube stores up to 4 spheres. Adjustable in length, it extends from 18-25 cm (7.09-9.84 inches), which allows you to save on freezer space when you have 1-3 spheres. Additionally, the hexagon-shaped bottom prevents the tube from rolling off the counter. We carefully chose a food-safe and freezer-tolerant PE Food Container Plastic as the material for Polar Ice Tube.