A packaging element used to collect or dispense product when pressed. The serving size from one press depends on the design of the dispenser and the consistency of the contents. Do not assume a constant serving volume if the manufacturer has not provided this information.
Portion depends on the design of the dispenser
The pump helps to repeat the application of one preparation, but pressing is not a universal unit of volume. The design, viscosity of the product and whether a full stroke has been made are important. New packaging may require preparation of the dispenser according to the instructions. The airless system limits the contents' contact with air in a different way than a regular tube immersed in a liquid. However, no packaging replaces the storage conditions and hygiene rules specified for the finished recipe.
Button size does not determine serving volume. If the manufacturer provides it in milliliters, this information relates to a specific dispenser and method of use. Pouring the product into a different package may change the portion and the conditions for protecting the contents, even if the liquid itself remains the same.
Meaning and application
The pump facilitates application, but it does not guarantee a constant amount specified in milliliters. The parameter depends on the design and method of use. If quantity is important to product instructions, look for it to be clearly acknowledged on the label.
In practice
Check the lock and outlet direction before pressing for the first time. Do not unscrew the package unnecessarily and do not add water if the contents seem thick. Keep the applicator clean and close it as specified in the package.
Don't calculate a certain number of uses based solely on the capacity and appearance of the pump. Also, do not transfer cosmetic instructions to a liquid supplement. Report a damaged dispenser or leak rather than trying to repair the packaging with tools over the open product.