10Oz. Our cups are made of food-grade 304 stainless steel, which are bpa-free and lead-free; these stainless steel cups are polished insides and outsides, will not hurt your mouth. You can use the cups for home, kitchen, hotel, restaurant, coffee shop, bars, party, wedding, anniversary, grand opening, travel, camping and outdoor, also these are very good gifts for Christmas, Holiday, and special occasions.