Doggie Reusable Bag by Envirosax. We love these adorable, reusable shopping bags. Each bag holds up to 40 lbs of groceries, and when not in use they roll up to the size of a Twinkie! Stash them in your purse or glove compartment and never have to use disposable plastic bags again. Perfect for toting groceries, snacks, gear, library books, toys, and more. Bags are made of durable, waterproof lightweight polyester and measure 17.70 x 15.75 unrolled and 4 by 1.5 rolled up.