Your child-resistant cap is the only closure judged on human behaviour rather than physics. It passes when children cannot open it and adults can, and both halves of that sentence carry weight for your project.
The 3 Child-Resistant Mechanisms in Common Use
| Mechanism | What the user does | Where it suits your product |
|---|---|---|
| Push and turn | Press the cap down, then twist. | Supplements, pharmaceuticals, anything in a screw-finish bottle. |
| Squeeze and turn | Pinch two marked points on the skirt, then twist. | Household chemicals, and users who cannot press down easily. |
| Snap lock or tab | Lift or depress a tab while pulling the closure clear. | Dropper and dispensing packs where a screw is not used. |
Why the Test Panel Decides Your Result
Your certification comes from a protocol with real people. Children of a defined age range get a set time to open your package, and a second panel of older adults has to open and properly reclose it.
That structure explains a frustration buyers meet. A closure that feels secure can fail the child panel, and one that passes can fail on adult opening, so no drawing predicts the result. Test the exact combination of your cap, your liner and your glass, since a change to any of the three invalidates the last result.
What Your Glass Has to Provide
The mechanism grips through the thread, so your finish is part of the system. Thread profile, start position and the height of your sealing surface all decide whether the cap stops where its designer intended.
Fix that early. SGSBOTTLE mould engineers put the CR finish on the drawing before cutting steel, so your closure supplier tests against the bottle you will actually receive from the 14 lines in Shandong and Xuzhou.
The mechanism grips through the thread. SGSBOTTLE holds finish tolerances across 14 lines in Shandong and Xuzhou.
Where Buyers Get Caught With CR Caps
Three traps recur. Assuming a CR cap fits any standard finish of the same designation, when stop position and thread depth vary between systems. Changing liner thickness after certification, which moves how far the cap turns before it seats.
And treating certification as permanent. Your test report covers one combination, so a new glass supplier for the same 200 ml (7 oz) bottle means testing again, however identical the drawing looks.
Balancing Access for Your Older Customers
Your senior customers are the group most often forgotten. A cap that defeats a child can also defeat arthritic hands, and the adult-opening part of the protocol exists for that reason.
Squeeze-and-turn suits your customers who cannot press firmly, while push-and-turn suits smaller diameters. Choose with your actual customers in mind, then confirm it on a filled 500 ml (17 oz) sample rather than an empty one.
What Goes on Your Enquiry
Your product and its destination markets, the format in ml and oz, the CR system you plan to use, and the closure supplier if you have one. SGSBOTTLE comes back with the matching finish, the drawing tolerances and bottles for certification testing.