I worked in a grocery store for a brief period after plastic bags were phased out and it's really not that uncommon for people who are picking up a few items to put them into their tote or reusable shopping bag, rather than use a cart of basket to shop.
Locally, it seemed to become more prevalent during the height of the pandemic when people were concerned about transmission and is something quite common now.
Locally, it seemed to become more prevalent during the height of the pandemic when people were concerned about transmission and is something quite common now.