If you wanted you could leave an 1/8th of cubes under your bed for a year and they would still work just perfect. The losses of potency that are always talked about would be interesting to someone studying the contents in a lab but it would have no meaning to someone who was consuming them. Loss from drying is really negligible. Mckenna suggested powdering weighed amounts and packing them tight into bags and packing those tight into a mason jar and freezing it and this way they would keep until doomsday.