An Accidental Innovation

In 1908, New York tea merchant Thomas Sullivan began sending tea samples to his customers in small, hand-sewn silk pouches, intending for them to empty the loose leaves for brewing. However, many customers, accustomed to metal infusers, mistakenly plunged the entire silk bag into hot water. This accidental method proved to be a convenient way to brew tea, and customers quickly began requesting their orders in the new 'bags.'

Beyond the Myth: Earlier Forerunners

While Thomas Sullivan is widely credited with popularizing the tea bag, he wasn't the first to conceive of a tea-holding pouch. As early as 1901, Roberta C. Lawson and Mary McLaren of Milwaukee, Wisconsin, were granted a patent for a "Tea Leaf Holder" made of mesh fabric, designed for single servings to reduce waste. This shows that the concept of brewing tea in a contained packet was an evolving idea before Sullivan's accidental success.

Evolution of Materials and Design

Sullivan's initial silk bags proved too finely woven for optimal infusion, leading him to switch to gauze as a more suitable material. Over time, particularly by the 1930s, filter paper became the standard for mass-produced tea bags. A significant innovation came in 1929 when German inventor Adolf Rambold of the Teekanne company developed the dual-chamber tea bag, further enhancing infusion efficiency.