Teapots and Tea Infusers

Loose-leaf tea needs space. As the leaves absorb water they unfurl, sometimes to several times their dry size, and they release flavor best when water can move freely around them. Much of what separates a good teapot or infuser from a frustrating one comes down to that room, plus a filter fine enough to keep leaves out of the cup and a material that holds heat the way the tea prefers.

This guide explains the main teapot materials, the specialist vessels used for certain teas, the difference between infuser baskets and the small balls many people start with, and how to clean and look after each.

Teapot materials

Glazed porcelain and ceramic are the most versatile. They do not absorb flavors, are easy to clean and hold moderate heat. Glass lets you watch the leaves open and the color develop, which is helpful when learning steeping times, though it loses heat faster.

Cast-iron teapots, usually enameled inside, hold heat well and suit black teas and blends. Unglazed clay pots, such as Yixing-style pots, are porous; over time they absorb oils and aroma from the tea brewed in them. Many tea drinkers dedicate one clay pot to one type of tea and never wash it with soap.

• Porcelain: neutral, easy care, any tea
• Glass: visual, cools faster
• Enameled cast iron: holds heat, heavy
• Unglazed clay: seasons over time, one tea type per pot

Specialist vessels

A kyusu is a Japanese teapot, often with a side handle, designed for green teas. Many have a fine mesh or ceramic filter built in at the spout to catch the small, needle-like leaves of sencha. A gaiwan is a lidded bowl with a saucer used in Chinese brewing; you hold the lid slightly ajar to strain as you pour, which suits many short infusions of oolong or pu-erh.

These vessels are small, often 150 to 300 ml, because they are meant for brewing a higher ratio of leaf to water and pouring it off quickly, repeated several times.

Infusers: baskets, balls and built-ins

A wide infuser basket that sits in a mug or teapot gives leaves enough room and lifts out cleanly. Look for fine stainless steel mesh, a lid that doubles as a drip tray, and a basket deep enough to reach well into the water.

Small tea balls and novelty infusers are cramped. Leaves cannot expand, water barely circulates, and the tea tastes thin. They are fine for small-leaf herbal blends but limit most whole-leaf teas. Teapots with a large removable strainer combine the convenience of an infuser with enough space.

• Wide basket: good for most teas
• Teapot with removable strainer: convenient for a pot
• Tea ball: cramped; best for fine herbal blends
• Disposable filter bags: easy cleanup, roomier than balls

Choosing the right size

Pick a size that matches how you drink. A 300 to 500 ml pot makes one or two mugs; 1 liter serves several people. A pot much bigger than you need tempts you to leave tea sitting on the leaves, where it overextracts. If you like large amounts, brew a smaller pot and pour it into a separate warmed serving pot or carafe.

Steeping well in any vessel

Warm the pot or mug with hot water first so the brewing water does not cool too quickly. Use the right water temperature for the tea, and time the steep. When it is done, lift the infuser out or pour all the tea off the leaves.

Leaves left in the water keep releasing tannins and turn the tea bitter and dry. For multiple infusions, pour every drop out between rounds so the leaves are not sitting in water.

Cleaning and care

Rinse teapots and infusers after every use and let them air dry with the lid off. For glazed pots and steel baskets, a wash with mild soap now and then removes tea stains; a paste of baking soda and water lifts stubborn ones. Brush fine mesh gently so you do not tear it.

Rinse unglazed clay pots with hot water only and dry them fully. Enameled cast iron should be dried promptly and not left soaking; avoid harsh scrubbers that damage the enamel.

Common questions

Why does my tea taste weak from an infuser ball?

The leaves are too packed to expand, so water cannot reach all of them. Switch to a wider basket or brew the leaves loose in a pot and strain them. If you keep the ball, fill it only halfway.

Can I use one teapot for every tea?

A glazed porcelain or glass teapot can brew any tea and be cleaned between uses. Unglazed clay pots absorb flavor, so mixing smoky black teas and delicate greens in the same clay pot will blur their flavors.

Is a cast-iron teapot the same as a tetsubin?

Not always. A traditional tetsubin is an unlined iron kettle for heating water. Most cast-iron teapots sold for brewing tea are lined with enamel and should not be heated on a stove. Check the maker's instructions before using either over heat.