Flowering Mealtime. Pass the salad around the table or serve pasta family style in the Oiva serving bowl. Sami Ruotsalainen designed this serving bowl and chose Maija Isola’s beloved Unikko pattern to give it life. Oiva's hard porcelain ensures a long lifespan; the glazed colors and patterns remain vibrant. It’s dishwasher, microwave and freezer safe. This Oiva piece is stamped with a special Unikko 50th Anniversary mark.