Turn plastic bags into yarn or plarn, and then knit it into a bag that you can use for all purposes. Source: Etsy user DawnesWeavings Plastic Bag Crafts, Plastic Bag Crochet, Recycled Plastic Bags, Recycled Crafts, Loom Knitting, Knitting Patterns, Crochet Patterns, Knitting Projects, Crochet Projects