What usually helps us to understand an object and how it is supposed to be used are signals  functional details send us: handles, spouts etc. In this jug the handle comes from inside the object, where the liquid is, and not as is usually the case, from the outside, the surface. Previous experience tells us that the handle is more likely to be a spout. This is also reinforced by the fact that the handle consists of a tube. On the other hand, we also see a small spout fastened on the outside of the jug. The confusion this produces might hopefully lead the observer to closer investigation of the object and the way it is  meant to be used. With this I want to avoid a normative hierarchical division of an object into bottom, inside , outside and so on. to make us see what we have once forgotten