Compatible serums, facial oils and fluid lotions can be packaged in a 50 ml glass bottle. Listed closures include droppers, treatment pumps and sprayers. Assess the formula's dispensing requirements and storage stability in the selected design.

A treatment pump can work with a lotion that falls within its viscosity range. Fill a sample and check priming, output and residual product. The closure's seals and internal parts also need to suit the ingredients.

Measure the full assembled bottle, including its pump or dropper cap. Allow space for protective cushioning and check that the bottle cannot move freely inside. A packed sample helps confirm the fit and handling protection before box production.