Yes a straw is what it's for. I thought that was made very clear. Sucking up water from a trickle stream or blowing on embers to light a fire. Hence the name Firestraw. It could also be used for a hamster splint. Maybe you could make it longer and use one for an internal frame pack stay.
Now I have to rethink all the multiuse items. If I carried all of them I might have to buy a bigger pack. I think the bandana wins so far.