As opposed to traditional ice cubes, the Avanti® Quartz Crystal Wine & Gin Pearls do not melt, ensuring your wine or gin stays chilled without diluting or compromising the flavour. Cut from natural quartz crystal the oval shape is perfect for wine or tumbler glasses allowing the pearls to slide freely throughout the glass whilst at the same time cooling. They are reusable, non-porous, odourless and do not impart flavour. They offer a perfectly chilled drink from the first sip to the last!