Unlike their plastic counterparts, its OK if these last forever!They do have a permanent arch, which I had hoped would be flexible, but thats OK, the angle is ideal.The Cleaning brush is a nice touch, though I seldom feel the need to use it for the straws I have found other uses for it.I find a bit of satisfaction every time I reach for My straw vs a disposable one.My opologies if this sounds silly, but my Footprint is important to Me!