Each product has been crafted from glass which is heated to ~700°C 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). Basically, it means that 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. Its capacity of these tumblers makes them the perfect vessel for table water, soft drinks and juices.