You said re-usable so not exactly what you asked, but I mostly use twiggy branches cut from shrubs and trees in spring with cotton support strings if necessary. They are compostable rather than re-usable. I tend to value ease of clean up in trellises.
For tall peas, I use bamboo stakes and strings. I do sometimes use skinny fiberglass fenceposts — I think they are meant to be used for temporary electric fence and deer fence. I only have limited number of them and they have many uses, so not always available for peas.
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