What Is The Quality Of Wheat Straw Tableware?

It is understood that there is currently no industry standard for wheat straw tableware, that is, the industry is still in a disorderly state of production. On a wheat straw water cup, there is indeed no standard logo, nor do I see the relevant grade mark.

In addition, many tableware known as wheat straw is not written in the “material” item of the product sales page, but “other” or “PP”, and even an online store, advertised “natural additive-free” but the product material is written “rice fiber + food grade PP”.