The Konik stemmed beer glasses feature seamless flame polished stems and are fully tempered glass from rim to foot. They have been thermal shock tested to 135c and can withstand temperature changes from hot to cold. The range offers you the assurance that comes with the internationally recognized quality of glass makers Vicrila who were founded in 1890 and are one of the oldest surviving firms in the Basque Country. In addition all the glasses in the range have the benefit of being fully tempered making them up to 5 times more resilient than standard glass and shattering into safer, small pieces should they break.