Flow caps are Flowtoys custom designed click-in end caps used in the ends of all Flowtoys where a leash attachment is not required (staff and poi ends etc). This flowcap includes a flowlight adaptor.
Flow caps replace the old flower caps in the advent of the Flowtoys capsule light (as first seen in PodPoi). The flow caps are more streamlined than the flower caps were and are compatible with both capsules and flowlights. The flow caps contain a removable flowlight adaptor (included and shipped installed) that must be removed before using these caps with capsule lights.
The soft button in the caps allows you to access the vast number of modes available with the capsule lights.
Made from a silicone outer shell, the flow caps keep dirt and moisture out of your rig and protects both the prop and your head from impacts.
The inner polycarbonate "snap cap" connects directly to a capsule or flowlight (using the adaptor) and clicks securely into and out of flowtoys tubes with a firm twist.
Here's Flowtoys' info video on the Flow Cap: