A unique circular child resistant system with 12 engaging drive ramps. Compack&rsquos cr 111 caps have 4 more times the drives than the other caps that have only 3 clicking ratchets on the side of the cap. The 12 drives in this unique circular mechanism means that minimal force is needed to remove or replace the cap. Other caps require considerable downward pressure on the closure before it becomes child resistant. For elder people whose hands might be disabled with arthritis or other degenerative joint disease, the less pressure required to close the bottle the better. This is an important safety measure as medicines that are packed in cr bottles are often used in the middle of the night when the patient is sick or half asleep. The emotional stress of the moment can often mean that people are not paying full attention when replacing the cap. So a cap like cr 111 reduces the chances of accidental poisoning caused by a non closed cap. This cap doesn&rsquot have a clicking back ratchet mechanism that could attract children to fiddle with the cap to produce that clicking sound, which can cause accidental opening.