Lys Clear stackable bowls, represents clarity, simplicity, and beauty. The collar on the rim makes them stackable. With all Duralex products, the Lys are made from true tempered glass, which means that they are both impact and chip resistant. These bowls are extremely durable and ideal for everyday use. The tempered glass makes them equally suitable for hot or cold liquids. Made in France, and made to last for years and years.