As sister glass of the iconic Picardie collection, the Duralex Provence glasses are just as functional and refined and they are also extremely comfortable in the hand. The teardrop pattern of these glasses adds a sophisticated casual look. The tempering process of these Duralex glasses is what makes them so tough. This treatment creates controlled stress in the glass which improves its resistance to impacts. These glasses are virtually unbreakable, however, if the tumbler does break then it is designed to shatter into small pieces which are less dangerous. Duralex is the specialist in the design and production of tempered glass tableware since 1945. More than ever, it is synonymous with toughness, design and everyday practicality.