Duralex Made In France Amalfi 6 Oz Clear Espresso Mug, Set of 6 Set includes six 6 ounce espresso mugs Duralex is 2-1/2 times more resistant to breakage and chipping than normal glass Duralex can also withstand sudden thermal shock: from -4F to 212F Duralex glass is very hygienic: It is non-porous and does not absorb liquids, colors or flavors Dishwasher, fridge and microwave safe; products maintain the original look for years Set includes six 6 ounce espresso mugs Duralex is 2-1/2 times more resistant to breakage and chipping than normal glass Duralex can also withstand sudden thermal shock: from -4F to 212F Duralex glass is very hygienic: It is non-porous and does not absorb liquids, colors or flavors Dishwasher, fridge and microwave safe; products maintain the original look for years