Double Wall Frosty Freezer Cold Mug - 16-oz, 3 Colors Available (Red) This Ice Cold Mugs is shatter-resistant and have special double walls filled with a fast freezing, non-toxic liquid. It can be frozen again and again. Put it in the freezer for 2 to 4 hours, remove and pour your favorite beverage. It will stay ice cold for hours without being watered down with ice cubes. Not recommended for microwave use Size: 3.75" x 3.75" x6.15" H ( 16OZ ) Color Selection: Blue/Red/White