Last year, we asked if you used coasters and the LARGE majority of responses were yes. We ran across these black (or green) coasters from Purpose Design and loved their multi-functionality. Instead of one use, they have (at least!) three...
The standard function is as a coaster, of course.
They are magnetized, so they can be stored on your fridge and can be pressed into service holding up the grocery list (or as shown, can simply BE the grocery list).
And, because they have a chalkboard finish, they can also work as place cards at the table.
Available at Purpose Design on Etsy.