Personally I collect those individual Salt and Pepper packets and include a couple for each meal. The left over wrapper can be used to start a fire (if you dare to have one) or adds little weight to your packed out trash.
I do use the small 1/4 ounce vials sold on this site for other spices like Mrs. Dash's, cinnamon, Garlic powder, etc. I use the Micro droppers for liquid things like Tobassco Sauce, bleach, deet, Aqua Mira, etc.
You could get creative and make your own custom spice mix in a small vial, but for a specific Salt and Pepper container, I choose the individual packets. They can be put into a waterproof container. Perhaps even the food container they are to be used for.