Simply fasten the small pump on the bottle mouth. One switch operation, totally hassle free even for kids and elders. Press the button to start pumping water. Connect the silicon hose with the end of water dispenser, and also insert the silicon hose into the bottle. Then fasten the water dispenser with the neck of bottle. Stylish look, easy to carry, solid hard to use, easy use provide convenience for taking out, best choice for the office, home, kitchen, camping, picnic, activities, etc. The water dispenser is specially designed for food and drinking. Totally safe and healthy product for even a baby. No need to charge every day, every week. Help you to easy your life. Just enjoy using the drinking water dispenser. Only one water dispenser needed if you have different size bottle.