I don't think you'll find a better option that good, strong zip locs. They don't weigh much, and only take up as much space as what's in them. But why pre-measure at all? Why not put it in one bigger ziploc and carry the scoop in it? Pre-measuring means more work and more complication. I like to keep things simple myself. (Just a thought, of course. You do what you'll enjoy the most)