6-pack with IPA Beer Glasses from Spiegelau. These beer glasses belongs to the Beer Classics series, which consists of glass developed for the specific character of different beers. They are made of thin-blown glass to provide an optimal taste and scent experience. This glass is custom made for IPA, and has been developed with two of the leading IPA breweries in the United States. The shape of the glass brings out the full spectrum of the beers flavors.