November 2, 2026 Which Serum Bottle Is Best: Dropper, Serum Pump or Airless? (15ml, 30ml, 50ml) Dropper, serum pump or airless: which serum bottle suits your formula, which size to pick from 15 to 50 ml, glass vs PET, and real per-piece prices. Continue reading Tags: 30ml serum bottle airless bottle amber glass dropper bottle price guide serum bottle serum pump vitamin c serum bottle