I received this as a shareholder benefit from Shimizu Corporation and have been displaying it in a dark place. I decorated it with artificial flowers, so I never put water in it. There is a white pattern (stain?) on the bottom. I'm not sure if it was there from the beginning or if it appeared after I got it. I'm not sure if I should wipe it with a wet wipe, so I've left it as is. (Image 4) There is no box or instruction manual. #kino_style