Answer first
Glass is non-reactive and helps protect sensitive ingredients such as peptides, and a dropper lets you measure 1–2 ml precisely without touching the serum. Keep the dropper clean, don't rinse it with tap water, close the cap tightly, and store away from sun and heat.
Measuring
Squeeze, release and check the level before applying.
Care
Don't let the tip touch your scalp or fingers, and don't leave the bottle open.
Questions
Is the bottle recyclable?
Glass is widely recyclable; check local rules.
What if the dropper breaks?
Message us.