Reusable water bottles are widely used, yet bacterial contamination remains a growing health concern, with studies revealing that they can harbor harmful microorganisms. To address this issue, PurePals introduces HydroHug, a 3-in-1 hydro filtration system that seamlessly integrates UV-C sterilization, reverse osmosis (RO) filtration, and a reusable filter, making it compatible with various bottle types. This cost-effective and sustainable solution ensures cleaner, safer water on the go. Comprehensive engineering analyses, including fluid dynamics, thermal performance, and filtration efficiency, validate its effectiveness, while user surveys highlight strong demand for UV self-cleaning filtration, particularly among active, health-conscious consumers. HydroHug is designed to optimize portability, adaptability, and ease of use, while addressing key challenges such as durability, battery life, and filtration speed. Future advancements will focus on enhancing material sustainability and filtration efficiency to meet evolving consumer needs. By bridging a critical gap in personal hydration technology, HydroHug delivers a high-quality, accessible, and innovative water purification solution for modern users.