For essential oils, a 10 ml amber dropper bottle is the most favorite. To showcase cold-pressed oils 30 ml amber and the green glass bottle is the number 1 choice for most of the brands. And for bigger volume items, a 50 ml amber glass bottle with a golden dropper is everyone’s favorite. Sizes: 5 ml, 10 ml, 20 ml, 30 ml, 50 ml, 100 ml