Keep Cool With These Great Double Wall Gel Freezer Mugs - 16oz. (Set of 4) Size 6.1" X 4.8" X 3.6" (Green) These Decorative Mugs are great for the daily use of all your cold beverage needs. BPA Free Acrylic Double Wall Construction, filled with Non Toxic Refreesable Crystals Eliminate the need for ice keeping your cold drink while not diluting or watering it down Simply place in the Freezer for 1-2 Hours before use Hand wash only Not recommended for Dishwasher or Microwave use.