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These are the best glass kettles we could find. With a nice metal handle, better quality glass and a nice pour. Glass kettles are extremely useful for a tea lover, as they help us learn to gauge temperature with our senses. The easiest way to learn the temperature is to look at the size of the bubbles. There are four basic temperatures of water important for making tea: “baby water” (app. 65–70 °C), “crab-eye water” (app. 70–80 °C), “fish-eye water” (app. 80–90 °C) and “old man water” (100 °C), which is sometimes also called “dragon water”. Sometimes tea lovers add two other kinds of water as well, “shrimp eye” and “string of pearls”. All these kinds of heat are named after the size of the bubbles at these temperatures.
This glass kettle is a bit more expensive, but will most likely last longer. All glass kettles are relatively the lowest quality kettles, compared to ceramic, iron or silver. But they are a must-have for anyone on the road to mastery.
After a Chajin has learned to see these temperatures by looking at the bubbles, you can then move on to correlating them to certain sounds and feelings in the handle of the kettle. Over time, you will learn to know the sound of your kettle at various temperatures and to gently test the temperature by feeling the handle. After you get established in a glass kettle, you can then move on to other kettles, occasionally lifting the lid to see if your feeling or hearing was accurate (even though this isn’t ideal, it can be a step in learning a kettle). Eventually, you will have a thermometer in your heart and be able to brew proper tea anywhere you are asked to!
Once you are finished with the learning process, glass kettles are great for boiling tea, either fresh or spent leaves.