For whom is The Second Breakfast Club Lord of the Rings Mug designed?

The Second Breakfast Club Lord of the Rings Mug. User @TaliesinMerlin shares an opinion about The Lord of the Rings: The Lord of the Rings is seminal to modern fantasy. It is also central to the contemporary discussions we have about worldbuilding. Tolkien wasn’t the first to write copious notes about the world he had build beyond the narratives of The Hobbit or The Lord of the Rings, but his appendices, The Silmarillion, and subsequent texts are remarkable in their commitment to envisioning a fully developed world beyond the narratives he had written. As a comparison, think about Arthurian literature for a moment. There is plenty of anachronistic worldbuilding going on even by the time of the Vulgate, Malory’s Le Morte Darthur, or post-Malory syncretic Arthurian narratives. But it’s all bound up in the narrative somehow: the spear of Longinus connects back to the Grail narrative and thence to the larger arc of the rise and fall of Arthur; the Roman Empire and the Civil War connect to Arthur either asserting his dominance as a young king (in some versions) or his overambition right before his fall (in other versions). The Saracens are mainly important as functions of the narrative, characterizing Sir Palomides or the mercenaries used by Rome. One can render all of this worldbuilding in encyclopedic format as Tolkien did his world, but Arthurian literature didn’t really do that outside of scholarship.
Tolkien certainly uses much of the detail in the world to drive his narrative, like the history of the Ents or the history of the Rings of Power. However, he goes beyond what most prior worldbuilders would do, creating whole lists of kings never mentioned in narrative, entire languages for what was spoken only a few times, Ages-long backstories for characters like Elrond who could have easily been left as mysterious supporting cast. In other words, Tolkien offers a glut of worldbuilding that I read as both post-romance (in the medieval sense) and modern, at once nostalgic for this hypothetical history and forward-looking to the way that subsequent authors would develop worlds that persist beyond the narratives that gave them birth, that become themselves a key feature of the text.