I typically use a cup to fill up my electronic device because it's simple and quick. The problem was that when I put the cup back down, there would be a little portion that dribbled down onto the desk. This issue had ruined 2 desk wide mouse pads and began to warp the wood, so I finally made a little coaster that I can set it on to catch the liquid. The liquid you see in the cup is what is has caught in the past month and my desk has been dry most of the time… I do forget to use the coaster.