Crystal glassware manufacturer Glencairn is marking 20 years of its signature whisky glass with the release of five coloured variants.Following the release of a limited edition black whisky glass last year, Glencairn Glass will now sell the signature glass in five colours – black, blue, red, green and gold. The new range of coloured glasses is said to offer "visual impact" while also enhancing the blind-tasting experience by disguising the colour of the whisky. The glasses can be purchased individually at £8 (US$10) each, or in a presentation box featuring the full colour range of five glasses plus the original clear glass for £60 (US$78). Scott Davidson, new product development director, said: “We were blown away by the massive success of our limited edition black Glencairn Glass last year which sold out almost immediately. “So in response to public demand, our 20th anniversary gift to loyal fans of the Glencairn Glass across the world is the introduction of this colourful new range, which is here to stay. Not only are the coloured glasses a fun addition to any drinks cabinet, tasting your dram blind is the perfect way to develop your senses and to learn all about the wonderful world of whisky”. Glencairn also marked the 20th anniversary milestone with a podcast series and the opening of a new expanded studio in Scotland.