Orifice reducers and refills
Updated
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What a reducer is for
A plug fitted in the neck that turns a free-pouring bottle into a controlled one. It makes a 120 ml bottle usable for topping up a diffuser without a funnel, and it reduces the mess that is most of the customer complaints in this category.
It is not restricted flow, unless it is
Where a paragraph of 1700.14 calls for restricted flow, the test is no more than 2 milliliters obtained from one inversion and squeeze or activation. A reducer may or may not achieve that, and you would have to measure rather than assume.
And it is not child resistance either
Slowing a pour is a convenience feature. Child resistance is a tested performance against the specifications in 1700.15(b). Treating a reducer as though it satisfied the second is the most natural mistake available here.
Refills carry the threshold question
Free-flowing liquid, no spray device, a closure the customer opens repeatedly. If your blend crosses a threshold, this is the package where that has consequences, and it is often the cheapest item in the range.
Reducers and oils interact
They are small plastic parts in permanent contact with the blend, so they are subject to the same softening and swelling as any closure, and a swollen reducer either jams in the neck or stops reducing anything.
Specify the reducer with the bottle
It has to match the neck finish, not approximately fit it. Every container page here lists the closures verified against its own neck, which is the place to settle this rather than at the filling table.
Small parts, disproportionate consequences
A reducer costs a fraction of the bottle and decides whether the customer can top up a diffuser without spilling oil on a table. It is also one of only three plastic parts in contact with the blend, so it carries more of the risk on this shelf than its price suggests.