I would only like to add one thing to the great storage idea ,and that would be to add a desiccant package or two , these are widely available in pill bottles electronics packaging. etc. etc.
The silicon type or calcium oxide type can be found in bulk bags of desiccant beads at hobby shops, health food stores etc. for cheap,and then make your own cloth bag for them, a teaspoon or two is all thats needed to be effective
This will stay off or absorb any type of moisture that either enters the enviroment or perhaps is created in the enviroment due to condensation, from tempreture changes
As I'm sure the majority is already aware that humidity, followed by drying, can greatly speed up the burning rates of such types of fuse..., it can also make it burn irraticaly or slower,but the faster burn is the one to avoid...
I have used them in large quantities over the years and have had great results in fuse staying true for as long as 7 years, with no change in burning speeds.....................
just a thought..............