Nakpunar 24 pcs 18mm Black Tamper Evident Caps w/Orifice Reducing Euro Droppers - For essential Oils - Black

These are the same kind of droppers you need for replacing those big glass eyedroppers. Or for oils that don't come with droppers at all, I have used them on bottles up to 30 mL so far and have had no fit problems yet. DON'T take the dropper out of the cap when mounting it on the threads. I've found that if you screw it all the way down onto the threads and then gently unscrew it the dropper part stays put. The lower part if the cap will come away and likely fall off the bottle. I have not found anything similar, so I bought 3 packages.

The style of these has changed in the past year, do not buy them. I put one of these caps (which I have been using forever) in a bottle of expensive perfume oil (same kind of bottle I have been putting these caps in for ages) and when I went to apply the perfume, the reducer fell out of the bottle and I spilled the perfume oil down my front.Extremely disappointed in the quality control with these, I tested the whole bag and 50% of the caps fall out/don't stay in. I can't trust them anymore. They even look different from the ones I got in the past from this listing that worked.Contacted the seller and they ghosted me after telling me it must be user error. I've used over 100 of these up to this point, never had an issue until they changed the style and quality control without notifying customers.

We make products that go in these. They are great.

Good

The dropper does not stay in the bottles - when you unscrew the caps to use them, the dropper gets stuck in the top of the cap.