Good grief! No it is not a cup of water, clearly most of the comments here are made up with total nonsense. Obviously it’s a photo with an an object that appears to be made with sand, limestone, soda ash and possibly silicates and melted into a a cylindrical shape with what appears to contain a liquid property of some sort, possibly h20. But without being in its presents and conducting a full analysis on the object(s), one may never know (assuming the image is not computer generated)