For in-store pickup only, and with availability limited by ZIP code, Walmart offers the Basic 16" Front-Pocket Backpack
in six colors (Grey pictured) for $3.97
. (Note that many colors may initially appear sold out, but will add to cart once you click them.) That's tied with last week's mention and $9 under the lowest price we could find for a similar, slightly smaller backpack. It's made of polyester and measures 16" x 11.5" x 5".