I just got a bunch of nutrient, yeast, sparkaloid, campden tablets, etc., for Christmas, and was wondering. I got the yeast in the fridge chillin', and I'll just keep the campden in a bag, but how do you store nutrient and other powder? If you open it, but only use 2 tsp, how do you keep the powder from getting everywhere? I was thinking of storing in a bag or jar, or just taping up the hole in the bag.