My research indicates that Tea Parties do not stop with the end of childhood. As indicated in this picture, young ladies, and even older ladies still love a good tea party. Even now, many places have Tea Rooms, where women go, and get dressed up, and enjoy an afternoon tea with some goodies. In my observation of these events, I have noticed that there are several important aspects to these, which I will present in priority order:
2) Dressing Up
3) Little cookies and other goodies
So, my conclusion is that "Tea" really has very little importance in a Tea Party.