Subtlety plays an important role in this group, and it may well take a second look to see the connections. Generally these marks have a volume to them, but you can assume the substance is in flux. Imagine the simple motion of swirling wine in a glass and watching it stir from side to side in a settling fashion. It is a sign of movement but not in a rushed or torrid fashion. Rather, it is gentle and certainly under control.
Given time, these marks look as if they should come to rest, but the viewer’s better judgment suggests that the rolling nature of these icons is ongoing, like the tides. Such a simple visual gesture that’s pure in geometry and can express a complex rocking nature is refreshing. These appear to have a liquid quality to them, but as a logo design, it demonstrates an entity’s ability to contain a volatile substance and control the results.