When it comes to tea kettles, there are a few different materials that can be used. The most common materials are stainless steel, cast iron, and ceramic. Each of these materials has its own pros and cons when it comes to health.
Stainless steel is the most popular material for tea kettles. It is non-reactive, so it won't affect the taste of your tea. It is also easy to clean and doesn't require any special care. However, some people worry that Stainless steel kettles may leach metals into your tea. If you are concerned about this, you can look for a stainless steel kettle that is certified as food-safe.
Cast iron kettles have been used for centuries and are still popular today. Cast iron is very durable and will last a long time if properly cared for. It also heats evenly, which helps to prevent scorching your tea leaves. One downside of cast iron kettles is that they can be heavy and difficult to lift when full of water. They also require seasoning with oil before first use, and need to be cleaned carefully to prevent rusting.
Ceramic kettles are another popular option. Ceramic is non-reactive like stainless steel, so it won't affect the flavor of your tea. It's also easy to clean and doesn't require any special care.. However, ceramic kettles can crack or chip if they're dropped or bumped too hard