This probably sounds really silly, but I want to get a second tea pot, and the size of the pot I have now is ideal. I have an Arthur Wood china teapot with a blackberry design that I got on a trip to Bermuda 15 years ago when I didn't even drink tea (I couldn't think of any other souvenir to get and I liked the way it looked). Now that I am drinking a couple of pots of tea a day using this teapot, I am concerned I'll break it, so I'd like to get another and save this one for special occasions.
So when determining capacity, how full do you fill the teapot? If capacity is what fills it to the brim, then its a six cup, but if it is to the level that I have read as optimum (more or less up to the point where it starts to narrow again) then its a four cup. I just want to be sure that what I order is the same size as what I have.