Frequently Asked Questions
-
The 10ml blue glass dropper bottle is the classic essential-oil size — 10ml and 15ml are what aromatherapy brands use for single oils and blends — and it works just as well for eye serums, beard and cuticle oils, lash serums and travel sizes of a face oil. Cobalt blue gives partial light protection and a striking shelf presence.
-
Roughly 200 drops — a standard glass pipette gives about 20 drops per millilitre of a water-thin oil, and thicker carrier oils give fewer, larger drops. In practice a 10ml bottle is roughly six to seven weeks at four drops a day. Tell customers the drop count on the label; it is the number they ask about.
-
Partly — cobalt blue glass filters some visible light but lets more UV through than amber. It is chosen for its look as much as for protection; if the formula is UV-sensitive (essential oils, vitamin C), sell it in a carton or pick amber or black instead.
-
Every bottle ships with its pipette, collar and bulb — pick the finish when you order: Gold + Black, Silver + Black, Gold + White, Silver + White and Black. The first word is the collar (the ring you screw on), the second is the bulb; “Black” or “All Black” is an all-black plastic collar and bulb.
-
Straight answer: a pipette dropper is a dispensing closure, not a shipping seal. On a shelf or dressing table it holds fine; in a courier parcel it can weep if the bottle lies on its side or the bulb is squeezed. Fill only to the shoulder, pack upright with the bulb up, and use a shrink band over the neck for parcels. Every dropper we sell is matched and checked to its bottle, but for a product that ships loose every day our euro-dropper bottles with a screw cap are the safer format.
-
No minimum online — order one piece to check the fit, then buy in bulk when the formula is final. The price on this page steps down as the quantity goes up; from 500 pieces WhatsApp +91 75500 42423 and we quote the exact item and quantity directly. Printed or painted bottles start at 1,000 pieces and custom closures at 5,000, and every order comes with a GST invoice.
-
No — they ship straight from the factory cartons, not pre-washed or sterilised. Wash the bottles, pipettes, collars and bulbs before filling: warm water with a mild detergent, rinse well, then sterilise (a 70% isopropyl-alcohol rinse, or hot water for the glass parts; do not boil the rubber bulbs) and air-dry fully, necks down. Never fill a damp bottle.
-
Yes — the 10ml dropper bottle also comes in amber, black, clear, frosted amber and green glass, all listed in the serum and dropper collection. If you want a pump or spray on this size instead of a dropper, ask on WhatsApp with the SKU and we will match one to the neck.
-
Yes — RENTRASPA dispatches the 10ml blue glass dropper bottle from Chennai to every state: Bangalore, Mumbai, Delhi, Hyderabad, Pune, Kolkata and tier-2 cities alike. In-stock orders leave within three working days. Order online with no minimum, or WhatsApp +91 75500 42423 for a wholesale quote; every order gets a GST invoice.