The Ravenscroft Amplifier Champagne Wine Glass features a tall slim cup with contoured sides and small mouth. The shape of this cup forces the bubbles to rise to the top creating a better taste as well as a more entertaining drink. This wine glass is ideal for these grape varietals and wines: Cava Champagne Prosecco and Sparkling Wine.Ravenscroft Crystal is the embodiment of old-world European craftsmanship blended with modern understanding of how a wine glass enhances the tasting experience. Each style of glass that Ravenscroft offers is the result of many years of glass-making trial and error. Each type of glass is individually designed and crafted to enhance the bouquet and taste of the wine or spirit for which it was made. The combination of being perfectly formed and light to the touch allows the bouquet to deliver the essence of the wine and spirits to the proper zones of the palate. To reduce the transfer of hazardous toxins into the beverage all Ravenscroft crystal products are lead-free.