The Igloo MaxCold Small Ice Freeze Block provides plenty of cold without any of the mess. For your busy days on the move, simply toss this reusable and non-toxic freezer block in your lunch box to keep everything cold until you need it. Non-toxic Ultratherm gel delivers extended cooling performance. Reusable block contains freezable gel. Fits HLC 6, 12 and 24. Dimensions: 4.25" x 0.75" x 5.25". Weight: 0.5 lbs. Hand wash with soap and water.