Coasters slash magnets slash blackboard. . .genius!
These coasters are made with a special UV coated vinyl that you can draw on with regular chalk and then wipe off with a damp cloth for their next use.Available right here from purpose design.
The cool thing is the cork backs have a small, strong magnet embedded in them so you can store them on the fridge when you're not using them. Each magnet is counter sunk so the back surface of the coaster remains flat.