You haven't quit.
I chewed and sucked on straws a bit after quitting. There are two aspects to the mental side. First is the digital addiction, the wanting to do something with your hands. Second is the concept that you have to inhale deeply to relax, hence the straw. It took a couple weeks and half a dozen straws, but by then I was done.
Another way to reduce any mental craving was to mandate that I wouldn't fake it in the house. I had to get up, walk outside (in whatever weather), and puff on my straw a few times. That was enough negativity and hassle to help fight any craving.
See my post to Ig. It was much later that I heard that smoking was a decision, and I had toggled that mofo to OFF and kept it there.