In order to understand the nature of "fullness", and the accompanying concept of "emptiness", one must first recognize that they are mere subjective descriptions, neither actually in existence except as a reference to other items exhibiting the same properties of fullness and emptiness- thus, in order to even begin to define them, one must understand the context of the terms- in this case, what is defined by "glass"? You cannot just measure it's form and properties and claim to understand the glass, but must understand ALL of the glass, down to the most fundamental level. In order to do this properly, in fact, one must understand the Universe fully, to appreciate not only the nature of the glass, but it's context, and how it relates to the rest of the universe- and considering the interconnectivity of all things (which one must assume in arguments such as these), that means understanding EVERYTHING on the most basic and the most complex level. How will the state of the glass affect things further in time? Consider the possibilities- if the glass is broken, someone may cut themselves on it. To use the cliched example used in most chain-reaction time theory, this person may then develop gangrene and die, while in another potentiality (were the glass whole, or not in so many little shards, all over the floor, or if the pieces were arranged differently), they would develop a cure for cancer. Which, in turn, may have saved the life of a local despot of some island nation in time for him to develop tactical nuclear weapons, which he then may fire at the Earth in such a way as to knock it completely out of orbit and into the Sun- and so, you may see, much may depend on the status and the nature of the glass. Moreover, this is not a one-sided force- the glass acts, and is acted upon, in true physics style. A quark shaking in a nebula a million light-years away may set off a chain of events resulting in a slight flaw in the glass, or the arrangement of certain stones on Mars may inspire a glassmaker to become flamboyantly homosexual and create the glass as one of those cheesy, garishly-colored martini glasses with the corkscrew stem. Granted, these are unlikely possibilities, but possible all the same, and if something is possible, it must be considered and understood in relation to the glass- not only must one know the glass, and the universe it is in, but all glasses it could have been, with all of their parallel universes. Naturally, this is impossible for any human- or indeed any being who is not, by definition, omniscient. Thus, the answer to your question can only be truly answered by one authority (the presence of a single omniscient/omnipotent being negates the existence of another), who may or may not even exist, and who certainly is not available to answer questions on fullness and emptiness.
[pinches diamondgeezer's wallet]