Covermark Foundation Compact Case with a sponge.
How to set the refill. With the lid of the refill container closed, insert the refill into the right side of the recess of the compact case, and push the left edge from above until you hear a click.
How to remove the refill. When removing the refill from the compact case, open the lid of the refill 180 degrees and lightly push it down to easily remove it.