Lily's Home Double Wall Frosty Freezer Mugs. 16 oz each. Set of 4 Keep your drink cold and refreshing with this set of 4 double walled mugs Eleminate the need for ice keeping your cold drink while not diluting or watering it down. Mugs hold up to 16 ounces of liquid and made of a PBA Free acrylic material Place mugs in the freezer for up to 4 hours to keep drinks extra cold Double wall is filled with non toxic, clear refreezable liquid. Made of PBA Free acrylic material