I have owned a teapot from sampletea for several years. It's one of my best teapots. (1990's Yixing Factory 5 Zi Qie Ni Shui Ping Hu Teapot, 90ml) clay is excellent and the craftmanship perfect. I wish could find another 90ml pot like this one. Sampletea also has a 30ml version of this pot so I bought two of them. I love tiny teapots especially when they have crisp details.
I was comparing the the patina on the larger pot to the newer small ones on new year's eve when we had guests. "look you can see how the teapot has changed over time" (I'm always trying to get more people interested in tea.) I wanted them to see the change in the patina from the wuyi oolongs that I drink in the larger teapot. See?
My friend said "It grew THAT much?"
LOL well, I guess that is a lesser known effect of "feeding" a teapot.