Tea bag

Commonly shaped tea bags
Tetrahedron-shaped tea bags made of polylactide (PLA), a bioplastic, shown here containing dried peppermint leaves
A tea bag being removed from a mug to stop the brewing process

A tea bag (or teabag) is a small, porous, sealed bag or packet typically containing tea leaves (Camellia sinensis) or the leaves of other herbs, which is immersed in water to steep and make an infusion. Originally used only for making tea, they are now made for other tisanes (herbal "teas") as well.

Tea bags are commonly made of filter paper or food-grade plastic, or occasionally of silk cotton or silk. The tea bag performs the same function as a tea infuser. Tea bags can be used multiple times until there is no extraction left. Some tea bags have an attached piece of string with a paper label at the top that assists in removing the bag, while also displaying the brand or variety of tea. There are also special tea filters that can be used to pour loose tea into and brew it in a bag in a cup.

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