The tea canister (fig. 22), a storage container for the dry tea leaves, was yet another piece of equipment to be found on the table or tray. Ceramic canisters of blue and white, and red and gold, could be purchased to match other tea furnishings of the same ware, and silver tea canisters often were fashioned to harmonize with the silver teapots of the period. Individual canisters were produced, as well as canisters in sets of two or three. A set of canisters usually was kept in the box in which it came, a case known as a tea chest or tea caddy, such as the "elegant assortment of Tea-caddies, with one, two and three canisters" advertised in 1796.[74] Canister tops if dome-shaped were used to measure out the tea and transfer it to the teapot. Otherwise, small, short-handled spoons with broad, shallow bowls known as caddy spoons and caddy ladles were used. However handled, the tea could have been any one of the numerous kinds available in the 18th century. Although Hyson, Soughong, and Congo, the names inscribed on the canister in figure 22, may have been favored, there were many other types of tea, as the following advertisement from the _Boston News-Letter_ of September 16, 1736, indicates:[75] To be Sold ... at the Three Sugar Loaves, and Cannister ... very choice Teas, viz: Bohea Tea from 22 s. to 28 s. per Pound, Congou Tea, 34 s. Pekoe Tea, 50 s. per Pound, Green Tea from 20 s. to 30 s. per Pound, fine Imperial Tea from 40 s. to 60 s. per Pound. In the 18th century tea drinking was an established social custom with a recognized etiquette and distinctive equipage as we know from the pictures and writings of the period. At teatime men and women gathered to pursue leisurely conversations and enjoy the sociability of the home. A study of _An English Family at Tea_ (frontispiece) will summarize the etiquette and equipage of the ritual-- On the floor near the table is a caddy with the top open, showing one canister of a pair. The mistress of the house, seated at the tea table, is measuring out dry tea leaves from the other canister into its lid. Members of the family stand or sit about the square tea table while they observe this first step in the ceremony. A maidservant stands ready with the hot water kettle to pour the boiling water over the leaves once they are in the teapot. In the background is the tripod kettle stand with a lamp, where the kettle will be placed until needed to rinse the cups or dilute the tea.