1. This manual water pump is easy to install and use, just put the pump on the water bottle and squeeze, the water will be pumped out. Innovative vacuum action, easy to pump water Use the vacuum action to quickly/slowly dispense the amount you want. 2. Our manual water dispenser is unlike any other water pump on the market that wastes money. Our water bottle pump is well designed and is the perfect functional product for home, office, camping or other activities. 3. Manual water dispenser that does not require power, energy-saving, easy to install and use. 4. Small size, light weight, easy to carry, providing you with a very simple way to drink water. 5. There is a convenient opening around the neck of the water bottle pump for quick and efficient filling of the beverage container, forming an effective seal.