The water purifier combined with the bicycle seat tube solves the problems of water shortage and unclean water source during outdoor long-distance cyclingAdopting the piston pumping principle for water intake, the three-layer filter element ensures a clean water sourceThe three-layer filter ensures a clean water source, comes with a straw for easy drinking, and is easy to carry when combined with the seat tube for immediate useThe product body is made of aluminum alloy, which not only ensures high strength but also lightweight, presenting a simple and beautiful appearanceAll materials are safe and corrosion-resistant, extending their service life and reducing energy waste