How does the internal movement inside a pyramid sachet mimic the ideal loose-leaf brewing environment?

The leaves can swirl, tumble, and circulate in a near-circular motion

The increased internal volume provided by the pyramid shape is directly responsible for optimizing the extraction mechanics. Once hot water is introduced, the leaves are not confined to a compressed layer as they are in a flat bag. Instead, the geometry allows them the freedom to move actively. Specifically, the leaves are able to swirl, tumble, and circulate, which creates a motion similar to what occurs in a traditional teapot or a spacious metal infuser. This active movement is essential because it guarantees that every particle of tea comes into consistent contact with the brewing water, thus maximizing the dispersion and extraction of complex flavors and essential oils throughout the entire infusion.