I leave mine in the plastic bags they came in (ziplock) and in the box they shipped in, I make a 250 ml old soda bottle of wet solution (1 micro, 1 macro) that lasts me from 3 to 5 weeks then I pull out the box and make more solution. I'm always adjusting how much of each I use to get the tank dialed in so I like doing it this way but you could use anything to store your dry ferts in as long as it's kept dry or air tight and out of any sunlight. I suggest the same way you handle your tablesalt, in a cabinet or drawer.
I remember someone here using stick on labels that fell off, so use a sharpie or something permanent to mark the container.