The idea of using cold metal coasters makes perfect sense to keep your drinks cool on a hot day. The Fin coasters from home-ware brand SOUDA are modern, simple to clean and lustrously perfect for any home.
The Fin metal coasters are made entirely out of sturdy, high-quality aluminum. Only four by four by four inches wide, these Fin coasters are the perfect size for any cup and they come with a backing of subtle cork padding to eliminate scratching table surfaces. The emphasis of the design is on the rigid tiny lines on each of the metal coasters that makes them super easy to clean and wash if anything spills on them.
I think it would be a great idea to pop these coasters in the freezer before you use them to ensure your summer drink will stay colder, longer.