Putting professional-quality car shampooing into the hands of retail consumers, new CarPlan Demon Foam snow foam car shampoo uses a custom-molded bottle with detachable foam head to turn an ordinary garden hose into a power washer. Launched by car care company Tetrosyl in the U.K. in July 2013, the product comes in a 2-L high-density polyethylene container with a deep recess in the back that holds the foam head and an integrated dip tube that controls the flow of product when a hose is attached.
For the project, Tetrosyl worked with RPC Containers Ltd. to create a custom container that was able to store the foam head during transit and storage, while at the same time effectively communicating the concept to the consumer on shelf. The resulting container holds the foam head in a cavity in the back of the bottle, while a hole in the front running through the center of the package enables the consumer to see the applicator when the pack is front-facing on shelf.
According to Brian Lodge, Design Manager at RPC Group, the “trickiest part” of the design of the new container was the back cavity. “It was difficult getting the container out of the mold, as we had to include clips to retain the foam gun in place,” he says. “In addition, as the recess was so deep (to half-way across the molding), it was difficult to form, as we needed to control the inevitable webs that formed in the plastic.”
By carefully designing the mold with all draft angles and surface finishes, RPC was able to alleviate both of these issues, Lodge says. “Punching a hole right through the middle of the container helped as well, as it helped support the recess,” he adds. “However, this did push the limits of the molding envelope for us to be able to achieve the desired results.”
