
A tea infuser is a device in which loose, dried
tea
Tea is an aromatic beverage prepared by pouring hot or boiling water over cured or fresh leaves of '' Camellia sinensis'', an evergreen shrub native to East Asia which probably originated in the borderlands of south-western China and nor ...
leaves are placed for
steeping
Steeping is the soaking of an organic solid, such as leaves, in a liquid (usually water) to extract flavours or to soften it. The specific process of teas being prepared for drinking by leaving the leaves in heated water to release the flavour ...
or brewing, in a
mug
A mug is a type of cup, a drinking vessel usually intended for hot drinks such as: coffee, hot chocolate, or tea. Mugs usually have handles and hold a larger amount of fluid than other types of cups such as teacups or coffee cups. Typically ...
or a
teapot
A teapot is a vessel used for steeping tea leaves or a herbal mix in boiling or near-boiling water and serving the resulting infusion called tea; usually put in a teacup. It is one of the core components of teaware.
Teapots usually have an ...
full of hot water. It is often called a teaball, tea maker or tea egg. The tea infuser gained popularity in the first half of the 19th century. Tea infusers enable one to easily steep tea from
fannings and broken leaf teas.
Use
A tea infuser performs a similar function as a
tea bag
A tea bag (or teabag) is a small, porous, sealed bag or Packet (container), packet typically containing tea leaves (''Camellia sinensis'') or the leaves of other herbs, which is immersed in water to steeping, steep and make an infusion. Origina ...
, a later American invention. The infuser is generally a small
mesh
Medical Subject Headings (MeSH) is a comprehensive controlled vocabulary for the purpose of indexing journal articles and books in the life sciences. It serves as a thesaurus of index terms that facilitates searching. Created and updated by th ...
, perforated metal container, or covered
spoon
A spoon (, ) is a utensil consisting of a shallow bowl (also known as a head), oval or round, at the end of a handle. A type of cutlery (sometimes called flatware in the United States), especially as part of a table setting, place setting, it ...
that holds tea leaves, in varying sizes, to steep single or multiple servings at once. Common shapes of infusers include spherical, conical and cylindrical. One style of infuser is a split sphere with
tong-like handles to open its mesh container.
The infuser is placed in a cup or pot of hot or boiling water, allowing the tea to brew without loose tea leaves spilling into the pot or cup. A rod or chain is may be attached to the container of the infuser to simplify retrieval from the pot or cup. Infusers with large holes may not catch all the leaves, requiring the use of a
tea strainer
A tea strainer is a type of strainer that is placed over or in a teacup to catch loose tea leaves. Despite the invention of the tea bag, it continues to be used widely as of 2025. Function
When tea is brewed in the traditional manner in a teapot, ...
to remove the remaining pieces.
Alternative use
Quick water imbibition
Water
imbibition
Imbibition is a special type of diffusion that takes place when liquid is absorbed by solids-Colloid, colloids causing an increase in volume. Water surface potential movement takes place along a concentration gradient; some dry materials absorb ...
takes half the time for material that floats with half its area above the water surface when they are submerged with an infuser.
Seeds are often pre-treated before sowing in order to verify that they will sprout.
Imbibition
Imbibition is a special type of diffusion that takes place when liquid is absorbed by solids-Colloid, colloids causing an increase in volume. Water surface potential movement takes place along a concentration gradient; some dry materials absorb ...
of water through the membrane of the seed shell is the first step in the
germination
Germination is the process by which an organism grows from a seed or spore. The term is applied to the sprouting of a seedling from a seed of an angiosperm or gymnosperm, the growth of a sporeling from a spore, such as the spores of fungi, ...
process in most seeds. Seeds can be submerged with an infuser, including
hot water scarification treatment for tolerant species. Seeds can be weighed with a milligram
scale before and after they have been submerged to find out when they don't need to be exposed to more water imbibition. Floating seeds can be inspected when they have to sink inside mesh infusers submerged in transparent containers by shaking them. Seeds who don't absorb water will not germinate and must be modified with further
scarification
Scarification involves scratching, etching, burning/ branding, or superficially cutting designs, pictures, or words into the skin as a permanent body modification or body art. The body modification can take roughly 6–12 months to heal. In t ...
.
Also, hot water treatment at 90 °C for 90 seconds followed by dip in cold water for 30 seconds can be an effective seed decontamination method against
escherichia coli
''Escherichia coli'' ( )Wells, J. C. (2000) Longman Pronunciation Dictionary. Harlow ngland Pearson Education Ltd. is a gram-negative, facultative anaerobic, rod-shaped, coliform bacterium of the genus '' Escherichia'' that is commonly fo ...
O157:H7 and
salmonella
''Salmonella'' is a genus of bacillus (shape), rod-shaped, (bacillus) Gram-negative bacteria of the family Enterobacteriaceae. The two known species of ''Salmonella'' are ''Salmonella enterica'' and ''Salmonella bongori''. ''S. enterica'' ...
.
Types
Ball
Ball infusers are removed along with the tea leaves from the pot.
Snap ball

Snap ball tea strainers are automatically sealed with the force of the end of the handle that is circulated like a
spring. The spring handle requires more metal to manufacture, so they are usually a bit more expensive than regular infuser balls.
The handle in snap ball tea strainers make them more practical:
* They can be used as a
spoon
A spoon (, ) is a utensil consisting of a shallow bowl (also known as a head), oval or round, at the end of a handle. A type of cutlery (sometimes called flatware in the United States), especially as part of a table setting, place setting, it ...
to swirl solutions that will dissolve their content faster than tea infusers without a handle.
* Air inside a snap ball infuser can easily be eliminated by shaking the handle once it has been put into liquid, to make sure everything inside the ball becomes submerged.
Shut-off infusers
Shut-off infusers are left in the pot after the brewing process is complete.
Alternatives
=French press
=
While not common, a
French press may be used as a tea infuser. However, most teas are infused only for a limited time and then removed from the water so that the drink does not become bitter.
In ''
gōngfu chá'' (功夫茶), a modern method of infusing tea in China, tea can be infused through a ''gàiwǎn'' (盖碗), a tea pot (茶壶) or a ''gōngdào bēi'' (公道杯).
See also
*
Tea culture
Tea culture refers to how tea is made and consumed, how people interact with tea, and the aesthetics surrounding tea drinking.
Tea plays an important role in some countries. It is commonly consumed at social events, and many cultures have cre ...
*
Melitta 401 and
Melitta 402 tea filters
References
{{Teas
Teaware