Northwind 12 Piece Stackable Glasses Make sure everyone has a glass with the 12 piece Northwind Stackable Glass set. These glasses are constructed of MS, a top quality, shock-proof and unbreakable material that is also scratch-resistant. These glasses are stackable, making stowing easy and convenient. Each glass in this set features a simple but elegant compass rose design, matching other dinnerware in the Northwind series. These stackable glasses are sure to add a touch of elegance to any vessel. Features: Includes 12 glasses Northwind series Shock-proof and scratch-resistant construction Simple and elegant compass rose design Northwind Stackable Glasses were designed for use in normal, not extreme, conditions. These glasses are not suitable for drinks with high alcohol content or very hot drinks. Not suitable for microwaves. These glasses are suitable for dishwashers, but in the upper tray only. To extend the life of these glasses, avoid using abrasive cleaners.