Igloo Maxcold Ice Soft Gel Pack 3.5" x .75" x 5.5". It uses non-toxic reusable Ultratherm gel for extended cooling performance. The soft pouch molds to fit around items in your cooler, providing localized intense cold. Flexible when frozen, it can be cut for a custom fit. Each reusable pouch contains 8 ounces (236 ml) of freezable gel.