Which is better for blooming tea?

The ZHCHSH glass teapot. The clear body lets you watch the flower open, and the removable infuser comes out for a whole bloom. The cast iron pot is opaque, so you see nothing.

Which keeps tea hot longer?

The Tetsubin cast iron pot. Cast iron absorbs and holds heat, so a full pot stays warm for a long session. The glass pot cools within minutes.

Is the cast iron pot worth the extra $56.64?

Only if heat retention and a traditional look matter to you. The glass pot brews the same tea for $12.99 and is easier to clean. The cast iron pot is the better pick for a tea shop or restaurant that serves pot after pot.

Can I put the glass pot on the stove?

Yes. The ZHCHSH pot is listed as stovetop safe, and it is also microwave and dishwasher safe. The cast iron pot has an enamel interior and should not be used for direct high heat.

The cast iron pot, if you avoid dropping it and do not chip the enamel. Glass chips and cracks more easily, and the bamboo lid can warp. Neither pot has a written warranty.

How much tea does each hold?

Both hold about 20 oz. The Tetsubin is 20 oz and the ZHCHSH is 900 ml, which is about 30 oz by volume but listed for 2 to 4 cups.

Tetsubin Round Black Cast Iron Teapot vs ZHCHSH Glass Teapot with Infuser

Buy the ZHCHSH glass teapot if you want to watch tea steep, brew blooming tea, or spend under $15. Buy the Tetsubin cast iron pot if you want heat retention and a traditional look that holds up in a busy kitchen. The glass pot is $12.99 at Amazon as of November 7, 2026, and the cast iron pot is $69.63 at Amazon as of the same date. That is a $56.64 gap for two pots that both hold about 20 oz.

Today the ZHCHSH Glass Teapot with Infuser costs $56.64 less at its best price.

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