Stackable Water/Wine Glass - NORTHWIND - Set of 6Practical glasses for water or wine with a navy blue base made of unbreakable MS that will also save you space, as they can be stacked. MS is one of the most knock-resistant materials in the sailing world and will make sure your meals are accident-free. Features:BPA FreeBreak ResistantUsage:This product has been designed for use in normal, not extreme, conditions. Not suitable for drinks with a high alcoholic content or very hot drinks. Not suitable for microwaves. Suitable for dishwashers, but in the upper tray only. To extend the life of the product, avoid using abrasive cleaners.