If you have ever watched a skilled tea host pour gongfu cha, you will have noticed a small pitcher sitting at the centre of the tea tray, receiving the concentrated brew from the teapot before it reaches anyone's cup. That vessel is the fair cup — known in Chinese as 公道染 (gōngdào bēi) — and it is one of the most important, yet most frequently overlooked, tools in the gongfu tea ceremony. Understanding what a fair cup does, why it matters, and how to choose one will meaningfully elevate every tea session you host.

What Is a Fair Cup (Gongdao Bei)?

A fair cup is a small pitcher or decanter, typically holding between 150 ml and 250 ml, that sits between the brewing vessel and the drinking cups in a gongfu tea setup. After steeping, the entire contents of the teapot or gaiwan are poured into the fair cup in a single continuous pour. This simple step accomplishes two critical things: it stops the infusion at exactly the right moment by separating the leaves from the liquid, and it equalises the concentration of the brew so that every cup poured is identical in strength and flavour.

Alternative Names: Cha Hai and Fairness Pitcher

The fair cup goes by several names. Cha Hai (茶海, literally sea of tea) is commonly used in Fujian and Taiwan, emphasising the vessel as a gathered pool of tea before distribution. Fairness pitcher and tea decanter are popular English translations. All of these terms refer to the same vessel and the same function.

The Philosophy of Justice Behind the Name

The character 公道 (gōngdào) in Chinese means fairness, impartiality, or justice. The fair cup embodies a core principle of gongfu tea culture: that every guest at the tea table deserves exactly the same quality of tea, regardless of where they are sitting or in what order their cup is poured. In a culture where tea service was historically a vehicle for expressing social hierarchy and hospitality, the fair cup represented a democratising force — the tea host's pledge that no guest would be favoured or slighted by the arbitrary mechanics of pouring.

Why the Fair Cup Is Essential for Gongfu Tea

Beyond its philosophical significance, the fair cup serves indispensable practical functions in the gongfu cha brewing sequence:

• Stops the infusion precisely. In gongfu brewing, steep times are measured in seconds. Transferring the brew to a fair cup arrests extraction immediately and completely.
• Blends the brew for consistency. Different layers of concentration swirl together in the fair cup, producing a single homogeneous brew that is poured identically into each cup.
• Allows the host to serve multiple guests gracefully. With a fair cup as the intermediary, the host can take a moment to position cups without any cup sitting too long under a dripping spout.
• Protects the tea's temperature. A pre-warmed fair cup maintains the tea's temperature as it is distributed, ensuring the last cup poured is as warm as the first.

Browse our selection of fair cups to find the right vessel for your gongfu setup.

Fair Cup Materials: Porcelain vs Glass vs Clay

Porcelain

Porcelain fair cups are the most common and versatile. Non-porous and flavour-neutral, they do not absorb any tea oils, making them suitable for every tea type. White or celadon porcelain cups also show the tea's liquor colour beautifully — an important consideration for appreciating a fine oolong or aged pu-erh.

Glass

Glass fair cups are extremely popular because they make the liquor colour completely visible. Watching a golden oolong or a dark pu-erh fill a glass fair cup is part of the sensory experience. Borosilicate glass is heat-resistant and durable; look for a thick base and a smooth, well-formed spout to prevent dripping.

Zisha Clay

Clay fair cups are less common but beloved by serious collectors. Like a Zisha teapot, a clay fair cup will absorb trace amounts of tea over time, adding subtle complexity to the pour. However, this also means a clay fair cup should be dedicated to one tea type. You can explore our range of teapots to find complementary clay pieces.

How to Use a Fair Cup in the Gongfu Brewing Sequence

Here is how the fair cup fits into a standard gongfu cha session, whether you are using a teapot or a gaiwan.

1. Pre-warm the fair cup. Before the first infusion, pour boiling water into the fair cup and swirl it around. Discard this water.
2. Brew the infusion. Add leaves to your teapot or gaiwan, pour water, and steep for the appropriate time.
3. Pour completely into the fair cup. When the steep time is up, pour the entire contents of the brewing vessel into the fair cup in one continuous motion.
4. Pour from the fair cup into drinking cups. Distribute the tea evenly into each guest's cup.
5. Repeat for each infusion. Pre-warm the fair cup again if needed before successive infusions.

How to Choose a Fair Cup: Size, Material, and Spout Design

Choosing the right fair cup comes down to three variables:

• Size: Match the fair cup capacity to your teapot or gaiwan. A standard 100–120 ml gaiwan pairs well with a 150–180 ml fair cup. An undersized fair cup will overflow; an oversized one will cool the tea too quickly.
• Material: Choose porcelain or glass for versatility and ease of care. Choose clay only if you are brewing a single dedicated tea type.
• Spout design: A well-designed spout is critical. Look for a smooth, tapered interior with no rough edges. The spout should extend slightly beyond the body's rim and angle gently downward.

You can also learn about the broader context of gongfu tools in our detailed guide on how to brew gongfu cha step by step. For more reading on the history of Chinese tea vessels, Wikipedia's gongfu tea ceremony article provides useful historical context.

Caring for Your Fair Cup

For porcelain and glass fair cups, rinse thoroughly with hot water after each session. Do not use soap on clay vessels; hot water is sufficient for porcelain and glass too, though mild unscented soap is acceptable if needed. Store the fair cup upside-down or in a breathable pouch to prevent dust accumulation. Check the spout periodically for calcium buildup — a brief soak in diluted white vinegar will dissolve mineral deposits without harming porcelain or glass.

Fair Cup vs Decanting Directly into Cups

Some tea drinkers — particularly those brewing alone — skip the fair cup and pour directly from the teapot into a single cup. This works passably for solo sessions, but as soon as you have two or more guests, the fair cup becomes indispensable. The physics of a teapot simply do not allow for perfectly equal, simultaneous pours into multiple cups without an intermediary vessel.

Frequently Asked Questions

Is a fair cup the same as a Cha Hai?

Yes. Cha Hai (茶海) and fair cup (公道染, gongdao bei) refer to the same vessel. Cha Hai is the preferred term in Fujian and Taiwan; gongdao bei is more common in mainland China and in English-language tea communities.

What size fair cup do I need?

As a rule of thumb, your fair cup should be roughly 1.3–1.5 times the volume of your brewing vessel. For a 100 ml gaiwan, a 150 ml fair cup is ideal. For a 150 ml teapot, aim for a 200–220 ml fair cup.

Can I use a fair cup for all types of tea?

Yes — a porcelain or glass fair cup is fully neutral and suitable for every tea type, from delicate white tea to heavily roasted oolong or aged pu-erh. Only clay fair cups need to be dedicated to a single tea type.

Do I need to season a fair cup like a Yixing teapot?

Porcelain and glass fair cups require no seasoning — simply rinse with hot water before first use. Clay fair cups benefit from the same gradual break-in process as a Zisha teapot: several rinses with the tea you plan to brew, and a few early sessions before treating it as fully ready.

Why does my fair cup drip from the spout?

Dripping is caused by a poorly designed or damaged spout. Look for a spout where the interior lip is slightly curved inward. If your current fair cup drips, try pouring slightly faster — a more decisive pour generates less dribble than a slow, tentative trickle. If the problem persists, it may be time to replace the vessel.

Choosing and Caring for Your Fair Cup

When selecting a fair cup, prioritise a clean, drip-free pour spout and a volume that matches your brewing vessel — typically 150–250 mL for a 100–120 mL gaiwan, giving you room for multiple tasting cups. Thin-walled porcelain fair cups are the most elegant and functional option, showing the liquor’s colour clearly and cooling the tea to an ideal drinking temperature rapidly. Glass options are popular for their visual clarity — watching the tea flow and seeing the exact colour in the cup is both practical and satisfying.

Care is minimal: rinse with hot water after each use and air-dry. Porcelain and glass fair cups can be cleaned with mild soap if needed — unlike Yixing teapots, there is no risk of flavour absorption. Browse Teaory’s fair cup collection for porcelain and glass options at every price point, and explore our full gaiwan selection to complete your gongfu setup.