What practical benefit related to reuse do high-quality pyramid bags sometimes offer over standard flat bags?
They can sometimes be successfully re-steeped two or three times
Beyond the mechanics of flavor extraction, the durability and construction of pyramid bags lead to tangible user benefits. Due to their robust, three-dimensional structure, these sachets are more resilient to wear and tear compared to flatter alternatives, making them less prone to bursting or tearing, which is especially useful for travel. Furthermore, for connoisseurs who wish to savor the lighter notes of a premium tea, high-quality pyramid bags often possess enough structural integrity and leaf quality to withstand multiple infusions. Proponents suggest that these bags can frequently be successfully re-steeped a second or third time, though the flavor profile will naturally become milder with each subsequent infusion.

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What makes a pyramid tea bag unique? | Unilever Food ... - YouTube