Actually its the opposite, you want a sphere so it has less surface for more volume, And by the way the Advertising Standard’s Authority has ruled that pyramid shaped bags are more effective than the more traditional flat, round tea bags when making a brew.
Pyramid tea bags better than round, advertising watchdog rules
Advertising Standards Agency upholds claims in PG Tips advert that pyramid shaped bags allow tea leaves to infuse more effectively compared to round bags used by rivals Tetley
Actually its the opposite, you want a sphere so it has less surface for more volume, And by the way the Advertising Standard’s Authority has ruled that pyramid shaped bags are more effective than the more traditional flat, round tea bags when making a brew.
Size matters, not shape in my opinion.
This is what you need for max flavor. The Menger Sponge made into a teabag.