The WATER TANK is a specific replacement part designed for the K-Duo Essentials 5000 Coffee Maker by Keurig. This water tank, compatible with Keurig and For Keuring brands, is essential for ensuring the proper functioning of the coffee maker. It allows users to easily replace a damaged or worn out water tank, ensuring that their Keurig coffee maker continues to function at its best and provide great-tasting coffee.