Since the creation by Dammann Frères of the Crystal sachet, demanding consumers can combine all the taste and esthetic pleasures of the tea leaf with the practical aspect of the sachet.n fact, the fine grid and the transparency of this sachet, that are the result of a technical feat, allow teas to be conditioned with all the same qualities appreciated in loose teas. Since it does not shrink in water, the sachet allows the leaf free movement to steep in the cup without any constraint. Furthermore, the tea is ideally dosed, which avoids the sometimes annoying guessing game of the perfect quantity of tea to steep.