Went in for a few groceries and walked out with a full haul? Nanobag's 25L XL Tote is a reusable grocery bag that carries up to 66 lb (30 kg), yet packs down to about the size of a golf ball in its attached pouch. It weighs just 1.05 oz (30 g), so you'll barely notice it in your pocket until you need it. Skip buying bags at checkout and carry everything home in one.