The see-through windowed mug is a great everyday companion for drinking your beverage of choice. Each windowed mug can hold up to 16 oz. of your beverage of choice and sports see-through die cut-designed windows. Be assured that this great-looking mug is safe to drink from as this is approved by the FDA. Make sure to keep it clean by hand washing it after every use. Do note that using this mug commercially is not recommended.