Wrap Veggies in Aluminum Foil Before storing broccoli, lettuce and celery, wrap it in aluminum foil. The foil will help to keep veggies crisp for up to 4 weeks. Just wrap in foil and store in your fridge’s crisper drawer. Instead of throwing out lettuce and other vegetables a few days after you buy them, you can keep them for up to a month so you don’t have to rush to eat them the minute you get home from the grocery store.