Patent information shows that 1903 has seen hand-sewn silk cotton bags. It is believed that 1904 teabags are commercially successful. There is a saying that in 1904, Thomas Sullivan, a businessman from new york, USA, sent a kind of tea in plain bags as a sample to the buyer in order to expand sales. After receiving the sample, a buyer accidentally forgot to soak it in a cup with a silk bag. The result was completely unexpected-his customers thought it was convenient to use vegetarian tea bags, and orders poured in. But after it was delivered, the customer was very disappointed-the tea was still in bulk and there was no convenient plain bag, which caused complaints. After all, Su Liwan is a clever businessman. Inspired by this incident, he soon made a small bag with a thin layer of gauze instead of silk, and processed it into a new type of small bagged tea, which was very popular with consumers. This little invention brought Sullivan considerable profits. The first batch of teabags in the world was born!