BV500 (700 cubic inches) holds food for roughly 7 days for one person; Outdoor food protection for large groups or extended trips BV450 (440 cubic inches) has capacity for roughly 4 days of food for one person; Perfect for weekend trips for 2 people, shorter solo trips, or ultralight backpackers. Every Ounce Matters Light weight design (BV450 - 2lbs 1 oz, BV500 - 2lbs 9oz.)