Fellow Michigangster here, I've always called it a shopping cart and so do my neighbors, but I did notice a difference when I visited family in Marquette, are you a Yooper? They called it a buggy up there. Also more importantly though you do call it pop right
MY WHOLE FAMILY IS YOOPERS you’re probably right, it’s probably a bridge divide!!
i mostly grew up in southern california, though, so i put my soda in a cart and not my pop in a buggy