Child Resistant Caps use mechanisms that create difficulty for children to open a container. Some of these styles include line-up and pop-off caps, squeeze and turn caps, and push and turn caps. Often, you will see either written or pictorial instructions on top of the cap. Similar to other caps, child resistant caps can have a variety of liners such as foam, foil, pulp, heat seal, PV and pressure sensitive. Some of these caps can also contain a tamper evident feature.