Smiling... I do the same thing. I have a Rosary Ring. I usually make two or three short trips in the car daily. (Decade there, Decade back} I have thought about buying them in bulk to give out. Thank you for reminding me.
A decade here, a decade there. They add up; and they add an interesting stability to one’s prayer life.
I just went online to look where we bought ours - we still have a hundred or so left - I believe it was through a KofC Council in Nebraska and couldn’t find it. They are metal and I believe about 25 cents each - easily affordable for spur of the moment gifts to strangers that one meets.