Review on Premium CoasterStone EC500 Absorbent Coasters - 4 Inch Size by Travis Oetting

I knew they would get dirty easily. But the design goes with other things in my house and I usually only drink water. I spilled tea on one and as expected it got dirty. I tried to cover everything with tea just to give it a uniform color. And the whole thing is painted over, but very unevenly. I'm currently looking for a way to color them (markers that leave a consistent color. But if that doesn't work I'll probably just buy more of these.