LADIS Bottle V2 is a portable 2-in-1 UV-C water sterilization system designed to expand access to safe drinking water, particularly for people vulnerable to infection. Its detachable 254 nm UV-C module treats up to 2 liters of water in 3 minutes, achieving 99% bacteria reduction. Unlike conventional UV bottles that permanently integrate the sterilizer into one container, LADIS V2 uses a transferable module compatible with both the reusable LADIS Bottle and standard PET bottles. Users can therefore bring sterilization directly to an available drinking container without boiling water or fixed treatment infrastructure. Designed for healthcare settings, vulnerable populations, travelers, and environments with limited access to water-treatment infrastructure, LADIS V2 combines measurable UV-C treatment with portable, flexible deployment. Its rechargeable, reusable architecture extends one sterilization module across multiple compatible containers, making microbiological water treatment more accessible wherever conventional infrastructure is unavailable or impractical.