A teabag is a small porous bag that contains tea leaves or herbal infusions and is used to steep in hot water for a specific amount of time. However, in addition to the commonly used term "teabag," there are other synonyms that are used interchangeably. One of the synonyms for teabag is "tea sachet," which is a bag made of fine mesh that contains a portion of tea leaves. Another synonym is "loose tea," which are the tea leaves sold separately that require a tea infuser to brew. "Tea ball" is another synonym and is a metal ball used to hold loose tea and steeped in hot water. Finally, "tea strainer" is a device used to strain tea from loose tea leaves or tea bags.