There are minute bits of plant fiber in the cup.

We'll be like cavemen, trying to weave clothes out of plant fibers.

His only clothing was a loincloth woven from some sort of plant fiber.

Of all the plant fibers, jute is probably the softest.

Subsequent examination showed that they were actually not feathers at all but plant fibers or similar.

The women wore a skirt made of Spanish moss or other plant fibers.

The paper itself was found to have been made of plant fiber, not tree pulp, from 1475 to 1640.

And what plant fiber had they used, to make it shimmer with almost no color at all?

Those have a wooden handle and plant fibers attached to them.

In principle, any plant fibers can be considered as raw material.