Okay, so looking around online yielded me only a Basil Market thread where the question was never truly answered and a Nexon forums post today that also has gone unanswered.
I was slaying some Red Porky and a purple teabag fell. The description says to use it in the 'Magical Teapot' in the Cash Shop. In spite of kind of rolling my eyes at a drop that needs a Cash Shop item, curiosity overwhelms me and I go searching for said item.
There is, as far as I can tell, no such Magical Teapot in the Cash Shop.
Am I correct in assuming this is probably some error?