A porcelain cup with black coffee that evaporated
<a href="//commons.wikimedia.org/wiki/User:%D7%90%D7%99%D7%9C%D7%9F_%D7%A9%D7%9E%D7%A2%D7%95%D7%A0%D7%99" title="User:אילן שמעוני">אילן שמעוני</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>