The Waterdrop A1 is a countertop reverse osmosis hot and cold water dispenser with 6-stage filtration including a 0.0001 micron RO membrane and dual UV sterilisation, removing over 1,000 contaminants including PFAS, fluoride, lead, arsenic, heavy metals, and microplastics, with instant hot water up to 95°C and chilled water to 5°C on demand. Unlike most countertop reverse osmosis filters which dispense ambient temperature water only, the A1 eliminates the need for a separate kettle or water chiller, making it the most versatile all-in-one water filtration solution currently available without under-sink installation. Recommended for families or households where multiple people have different drinking water temperature needs and who want the benefits of reverse osmosis without compromising on convenience.