Duralex Amalfi Glasses 1004AC04/4, Set of 4, 6 oz. These classic French glasses feature slightly flared rims and are perfect for both entertaining and everyday use Constructed in France of impact- and chip-resistant tempered glass by Duralex, the company that invented the glass tempering process Tempered glass is nonporous, so it wont absorb liquid and is two-and-a-half times stronger than ordinary glass Duralex glasses are stackable and safeif broken they shatter into small chunks as opposed to jagged shards, reducing risk of injury Microwave, freezer and dishwasher safe