Vitamin c serum pump vs dropper

Question: I want to start using a vitamin c serum, however I'm totally confused. All of the well-known and recommended ones are in a bottle with a dropper which obviously exposes the serum to air and oxidation. Why are these products recommended so much? Is there a reasonably priced one with a pump that you can recommend?

Thank you for reaching out to us . I would recommend Sunday Riley`sC.E.O. Rapid Flash Brightening Serum I would also recommend following up with theirC.E.O. C+E antioxidant Protect+Repair Moisturizer for added benefits.Hoppe this helps, have a nice day!