Not wishing to invest in a teapot, I bought for me without this tool it is for a duplication. (Cause next move retaining piece in Paris). With a good electric kettle, superbly efficient. He lets a few leaves (mate genre) but keeps its promises. The small saucer is useful to rest the infuser after use. That said, another without arises just as well in a saucer! (Probably handy for traveling against.) The somewhat flexible sheet makes it pleasant to use. Very easy to clean under the tap. Allows the use of bulk teas, pure happiness!