Granite’s high thermal mass and aluminum’s high thermal conductivity combine to conduct heat from the glass and keep your drink cool as no other coaster can. Coasters ensure glasses will never tip because they fit inside precisely bored holes. Ideal for sipping and serving fine scotch whisky, whiskey, and other spirits without dilution. Solid granite, aluminum-clad coasters, and chilling stones keep fine spirits at the optimal sipping temperature. Designed and handcrafted by our team of local artisans in New Hampshire. Our solid granite aluminum-clad cool coasters set lets you serve perfectly chilled spirits in impeccable style, with no chance of spills. Each set combines two of our ever-popular the rocks solid granite chilling stones, two recycled glass tumblers, and two rock-solid cool coasters to go directly from the freezer to the sipper while ensuring that each drink reaches its destination perfectly chilled and undiluted. The handsome coasters are made of upcycled granite lined with aluminum to keep your drink cool and fitted with soft bottoms to prevent table scratches. The precisely-bored holes nest the glass tumblers securely into the coasters’ deep recesses. Identifying your coaster is easy as natural granite colors vary. Each cool coaster set makes the perfect gift for your favorite connoisseur. Pair them with a bottle of their favorite fine spirit and the gift is complete.