Self-cleaning water bottles use advanced technology to keep themselves clean and free from bacteria. They typically feature a built-in UV-C light that activates at the push of a button, effectively killing up to 99.99% of germs and contaminants in the water and on the bottle's interior surfaces. This process usually takes just a few minutes, making it a convenient option for maintaining hygiene. These bottles are designed for people on the go, eliminating the need for frequent manual cleaning. Many self-cleaning water bottles are also made from durable materials like stainless steel or BPA-free plastic, ensuring they are safe for daily use and can withstand various conditions.