Duckhouse NFL Tumbler: * Team colors and graphics * State of the art refreezability * Eliminates the need for ice * Keeps drinks cold without the watered down affect of ice * Place in freezer 1 hour or more prior to use * Frozen crystals will turn a frosty white color * Filled with non toxic, refreezable crystals * Not recommended for dishwasher or microwave * Plastic tumbler is perfect for everyday use * Officially licensed * Available in a set of 3 or 6