Crystal Freezer Mug Boston Bruins design shown on a 16 oz. mug to keep your beverage frosty cold! Cup made of durable, hard plastic. This quality mug features state-of-the-art refreezability with crystals between the inner and outer layer, giving a frosty, sparkling look. The color coordinated handle and base of this mug are in your team colors. Quench your thirst with some team spirit! Easy care, dishwasher safe, top rack. Place empty mug in freezer for a few hours to achieve freeze, and your drink will be ice cold for your enjoyment. Order your Boston Bruins Freezer Mug - Crystal today.