Bendy straws were originally medical equipment and are still the only way for some people to be able to drink without spilling or having someone spill on them. For instance my husband’s a quad. Without a bendy straw, I have to tip the cup into his mouth without being able to see clearly either the level of the liquid or the angle of the cup to his mouth, especially the far side. He can’t tell me because drinking, nor move his head or hands to signal or correct me. A straight straw is almost impossible because he can’t tilt his head down to drink. With the bendy straws his face is straight and as long as the straw is between his lips he can drink at his own pace. But those rubbery straws are too thick, he can’t suck that hard. And we’ve never found a metal one that’s bent at the right angle. So we’re sticking to plastic, just have to make it up in other areas. Now, why they’re not made with recycled plastic, I don’t know.