The scope of people you mention with that disability is very very small. And still, they could work around metal by using a piece of rubber on the tip. Hell, someone could invent a special straw just for disabled people (we could make it longer and more flexible, you might call it a tube!).
Instead of ripping apart my lay ideas and complaining about our attempts at fixing climate change, perhaps we ought to be thinking of better solutions for our friends with disabilities. Because ultimately, climate change will take the lives of people with disabilities before it takes the lives of able-bodied people.