Made of white stoneware. The Oiva serving dish features the black and white Siirtolapuutarha pattern on the inside and it is made of dishwasher, oven, microwave, and freezer safe white stoneware. Siirtolapuutarha (city garden) is a brilliant line drawing which tells a tale of a journey from a bustling city centre to an allotment garden overflowing with flowers and vegetables.