Below are all my materials, as you can see I use droppers for each material, sometimes I screw them on top of the bottle and when that doesn't work I keep the dropper in a plastic back around the neck of the bottle, so I can't make a mistake by using the same dropper for different materials:
Some magazines about perfumes.
It's nice to create perfumes in a cleaned up, and organized perfumery room. But I have to remind myself to keep it this way. When I create I can make a mess all over again. To keep things neat is the last thing that's on my mind when I create perfumes.