Innovative vacuum action for easy operation. Easy working: Just press the pump head water will pump out. Economical: no battery used and no electricity cost. Environmental friendly. Fits most standard water bottle sizes. Removable tube for easy cleaning. Compact size and light weight. Perfect for home office school factory and all public occasion use. Supply you a very easy way to drink water. Material: Food Grade Plastic.Fits most standard water bottle with diameter of 6cm/2.4\ bottleneck.