Is this for you at all
Updated
On this page8
What this covers
Reed diffusers, refill bottles for them, car diffusers and hanging diffusers. All four are small glass bottles of a thin scented liquid, and all four are sold to be opened and left open, which is unusual.
What it does not cover
The electric diffuser itself. An ultrasonic or nebulizing appliance is a device with its own electrical and product-safety questions, and nothing on this shelf is one. We stock the bottle the oil arrives in.
The rule that catches people
The Poison Prevention Packaging Act regulations list substances by name and by percentage. Over 5 percent methyl salicylate by weight, or 10 percent or more hydrocarbons at a low enough viscosity, and the product needs child-resistant packaging. Wintergreen oil is mostly methyl salicylate.
And the exemption is a closure
Both hydrocarbon paragraphs exempt packages where the only non-child-resistant access is a spray device, with the pump either child-resistant or permanently attached. Nowhere else in this library does the choice of closure decide whether a regulation applies.
Then it has to survive the oil
The standard requires the special packaging to keep working while in actual contact with the substance inside it. Essential oils dissolve many plastics, so compatibility is not a durability nicety here, it is the same question as compliance.
Which is why the shelf is glass
All 63 containers we stock for this are glass, 7 to 120 ml. That is not an aesthetic preference, it is what the contents allow, and it is the shortest explanation of this whole property.
The commercial shape of this category
These sell as gifts and as home goods, which means the bottle is part of the product in a way it is not for a cleaner, and a range is bought together rather than one bottle at a time. A small shelf of 63 glass bottles is therefore less of a constraint than it sounds: what you need is consistency across four or five items, not variety.