The 18.21 Man Made Liter Pump fits all 18.21 Man Made litre-sized products to help easily dispense product and ensure you get to the very last drop. Also compatible with most other brand's litre-sized products. What does it do? Compatible with all 18.21 Man Made litres Compatible with most other brand litre-sized products How Do You Use It? Insert pump into the bottle then secure firmly. To open the spout, hold the cap on the neck of the bottle and twist the spout counter-clockwise until it pops up