While that's certainly an option, it would require both that I remember to grab my accumulated coins before leaving for the shop and that I spend extra time fee

While that's certainly an option, it would require both that I remember to grab my accumulated coins before leaving for the shop and that I spend extra time feeding them into the machine. These friction points will probably lead me to my current path of least resistance, tossing my coins into a container on my dresser and dealing with them about once a decade when it fills up.