Before the days of tea bags when one wanted an individual cup of freshly brewed tea, there was the Tea Infuser Spoon. The hinged opening allowed one to open it, pour the loose tea in it, then close it and place the spoon in a cup of very hot water. As you gently stir the spoon, the tea is "infused" in the water. Some designs are oval shaped and some are ball shaped.
(Shown in Mayflower by Coin 5 1/2 inches)
(Shown in Monticello by Lunt 6 1/4 inches)
(Shown in Wedding Rose by Watson 5 7/8 inches)
(Shown in La Perle by Reed and Barton 7 inches)
Shown in Carolina by Lunt 5 3/4 inches