This very thick natural linen twine is so natural it smells earthy.
I used this to make the crocheted planter pictured (and had some left over). The thickness and strength of this material allows the planter to stand up without slouching over. You could make bowls (which would hold their shape well too) or table mats etc.
I'LL EVEN THROUGH IN A FREE PATTERN FOR THE PLANTER.
This pattern requires a size 10 crochet hook. I have these separately for sale, but of course can include in the postage cost.