Looking for glassware that offers the ultimate combination of performance, practicality and durability? The duralex empilable collection of stackable drinking glasses ticks each of those boxes effortlessly, with a design built on techniques that have made duralex one of the leading names in glassware for over 70 years. each piece has been crafted from tempered glass which is heated to ~700c then suddenly cooled by cold air ventilation. the result is a glass that is more than twice as strong as standard glass, with exceptional resistance to shocks both thermal (sudden changes in temperature) and mechanical (being knocked or dropped). so far, so impressive - so what does that mean for you? basically, it means that duralex glassware has been built to cater perfectly for the rigours of even the most demanding modern home or kitchen, for as long as that home or kitchen needs it to. the capacity of these tumblers makes them the perfect vessel for table water, soft drinks and juices. The specially-designed shape allows you to stack your glasses together, making them an ideal option for places where storage space is at a premium.