havent received mine yet, but most of the time theyre in bags. i just put them in little plastic storage containers, like for keeping food and stuff. i like these, theyre stackable. $3 at walmart
oh and youll need a good set of measuring spoons. most places only carry the bigger size, but you need smaller for planted tanks, sometimes down to 1/64 tsp. thats when these come in handy. they have the typical smidge, dash, pinch sizes, which all translate to tsp fractions. kinda hard to find in stores, so i just get them on ebay