Strahl Design+Contemporary 12-Ounce Martini Glass, Set of 4 Made of high quality polycarbonate- a remarkable material that has the weight, clarity and brilliance of fine crystal and is virtually unbreakable Perfect for barbecues, poolside, on a boat, or for everyday dining Microwave and freezer safe (perfect for chilling glasses and storing pre-made nibbles and desserts) Dishwasher safe for easy clean up