In some embodiments, a method of insertion of uniquely shaped packaging elements may include one or more of the following steps: (a) transporting a container along a conveyor, (b) securing the container, (c) aligning a spray cap mechanism over a container opening with a transfer rake assembly, (d) grasping a diptube with a diptube assembly, (e) lowering the diptube assembly and the transfer rake assembly to insert the diptube into the container, (f) securing the container with a timing screw, (g) loading the spray cap mechanism into a sprayer magazine, (h) locking a retractable stop onto the spray cap mechanism, (i) transferring the spray cap mechanism from the sprayer magazine to the transfer rake, (j) locking a second spray cap mechanism with the retractable stop, and (k) retracting the diptube assembly after inserting the diptube into the container.