The adjustments of value result in changes in the press depth. Normal values of volume of dispense needed for hairs of different length but an average density are printed on the bottle. An preset of the value leads to a certain amount of shampoo dispense released by one complete press on the push pump cap. Different amounts of usage can be set for different family members and marked by sliders in different colors so that users can adjust the value from last set by a quick turn of the gear.

Mechanical, materials and manufacturing engineering (M3) at The University of Nottingham Ningbo China is an exciting, dynamic and fast growing department. Its programmes cover mechanics, dynamics, kinetics, thermodynamics, energy, fluids, materials, manufacture, ergonomics and design. The Department of Mechanical, Materials and Manufacturing Engineering has strong links with the corresponding departments in the UK and Malaysia campuses of the University of Nottingham. Its exceptionally close involvement with Chinese and international institutions and industries ensures a high quality teaching and research in the relevant professional fields.