A Mystery Box usually contains plants that are somewhat smaller than others we sell, but might have some (very!) large Sarracenia (pitcher plants), and might consist of a variety of plants, or multiples of just several types of plant, or possibly only a quantity of a single type of plant.
The choice is ours and we take no special requests for the Mystery Boxes. It's a great bargain, but it's also a bit of a gamble for the customer.
A Mystery Box is a great way to obtain Venus Flytraps or pitcher plants for a mass planting, bog garden, or mini bog, to simply increase one's collection or have multiple Venus Flytraps to plant together in a larger container. A mystery box is also great for beginners who want to learn how to grow carnivorous plants without spending too much.