Small porous sachets containing a measured portion of tea leaves, designed for convenient single-cup infusion. Tea bags — typically of filter paper, nylon mesh, or biodegradable PLA — allow rapid extraction while containing the leaves for easy removal. They dominate many Western markets for their speed and cleanliness, though connoisseurs note that confined space and the fine ‘dust‘ grades often used can limit flavour complexity compared with loose-leaf brewing. Pyramid bags with whole-leaf grades partly close that gap. Food-safety and quality considerations include the microbiological quality of the tea, migration safety of bag materials in boiling water, and correct fill weights.