So basically how this works is that you can right click air blocks between Y levels 192-196 i.e. cloud level to get yourself a Cloud in a bottle item which can be stacked up to 16.
You can right click the item to place a cloud block down even in mid air with no blocks supporting it. The block itself is pretty much acts like a Non-Newtonian fluid i.e. has properties of both a solid and a liquid simultaneously, if your walking or standing still you'll sink in the block but if your running the block will add like a solid block instead.
Though the block doesn't lasts for long and will eventually decay it about 3-8 seconds.
You can make a permanent version of these by combining four bottled cloud items to get a condensed cloud block.
