DH and I have the tiny glasses that fit inside a case attached to the back of our phones—best invention ever! We only started using readers a year or so ago, so these are perfect for now.
I have a focusing stigmatism so I have "extreme readers". I carry them in a glasses case in my bag for when I need them. I started doing that after I left them on Dinosaur now I make sure they always go in my case so I don't lose them.