Corelle Vitrelle White Dessert Berry Fruit Bowls are a set of six round, pressed glass bowls with a glossy finish. They are break-resistant, microwave and dishwasher safe, and feature a pattern of berries on a white background. The bowls are 5 3/8 inches in diameter and are made of Vitrelle glass. They are part of the Winter Frost White product line and were produced in the United States in the 1990s using fused glass production technique.