lifestyle Foods to keep in your bunker to survive the zombie apocalypse (14 Photos) By: Sebastian In: Food and Drink, Lifestyle, Mind Blowing Jul 3, 2019 411 Liked! 23 Disliked 0 1 Unopened nut butter with no moisture and plenty of oil can be kept for at least three to five years. Expired peanut butter won’t negatively affect you but it will taste bad. Like this post? 411 Liked! 0