Excalibur 32-Piece Picnic Backpack with Blanket for $24.99 shipped. Here is a screenshot for your reference. In addition to the backpack for organization, it can serve 4 with reusable plates, matching cutlery, beverage glasses, and clothe napkins, and a picnic blanket with a water-resistant lining. Others have it for about $59 or more.
Originally posted earlier, this is just a friendly reminder.