Enamel Teapot Which Is Better A Glass Teapot Or A Cast Iron Teapot?

Which is better a glass teapot or a cast iron teapot? - enamel teapot

I bought a cast iron teapot with enamel inside, but my mother had bought me a glass, not that I know. I do not know what is better or if with different teas are used or what the comparisons between the 2? All information, advice or assistance is greatly appreciated!