You've probably heard of "Joy of North" or freeze drying or even used freeze dried products without knowing it. It's a quite common process to preserve food and produce easily re-hydrated food products for a variety of different uses. Anything from instant coffee and ready-made trekking meals to speciality and super foods can be produced by freeze drying. Any time very long shelf life, minimal weight, and ease of use are a priority, freeze drying is a viable option. It's also free of any additives and preservatives, which makes it an ideal way to preserve natural, organic and health food.