The collection includes several sizes and dispensing styles, including applicator, pump and mist spray combinations. Choose a format around the product's use and consistency. The exact material and closure specifications should be checked in the relevant listing.

Check resistance to the finished shampoo, the closure's flow and the customer's grip during use. Assess the filled container for leakage and deformation over time. Label adhesion should also be evaluated in the moisture conditions expected during use.

Ask the supplier which cleaning agents and temperatures suit the container and closure. Use a validated preparation process within those limits. Check samples for surface changes, warping and sealing problems before applying the process to a full batch.