Bag of Holding

Bags of Holding are remarkable in their design, and their application is usually only limited by their owner's imagination. This bag has an interior space roughly 2 feet in diameter and 4 feet deep. The bag can hold up to 500 pounds, not exceeding a volume of 64 cubic feet. The bag always weighs 15 pounds. Breathing creature inside the bag can survive up to a number of minutes equal to 10 divided by the number of creatures (minimum 1 minute), after which time they start suffocating.