Adapta-Cap Size A Bottle Adapter (18 mm)

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Easily dispense essential oils!

  • Helpful when making blends, filling capsules, creating samples, and transferring liquid.
  • Fits standard essential oil vials and other bottles with a 18-415 neck.
  • Use with a straight-tip syringe.
  • Made from high-quality LDPE plastic.

This Adapta-Cap™ makes it simple to dispense essential oils when making blends, filling capsules, creating samples, or simply transferring liquid from one bottle to another. It fits perfectly on standard 5–15 ml vials or bottles with neck size 18-415. This blue, size A cap is made to be used with any of our straight-tip syringes.

Neck: 18-415. (To determine the right size Adapta-Cap™ for your bottle, click here.)


  1. Insert a syringe tip into the adapter hole of the cap.
  2. Tip the bottle.
  3. Draw out the amount of oil needed.
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