GREAT-VALUE REPLACEMENT - Great value but still works great. Includes two pieces of water chamber you need compatible with S10 series in one pack for durable use supplies by Everness. EASY TO CLEAN - The real kicker is cleanable! No more weird gunk or mold buildup over time. Please note that don't pop it in the dishwasher. PERFECT FIT - Works greatly with your S10 series, the design is smart and user-friendly. It's super easy to disassemble and reassemble for cleaning, and it doesn't have a gazillion tiny parts that you'll lose in the process. SUPREME SEAL - No leaking and can protect your nightstand, it brings convenience and peace of mind worth every penny. SPOT-ON CAPACITY - It holds enough water to keep the air comfortably moist throughout the night without needing constant refills. PATENT PROTECTED - This product is protected by US Pat. D1,017,503 S, Pat. D1,072,705 S, offering exclusive features and superior craftsmanship; Experience peace of mind with reliable, durable performance that stands out in quality and innovation This item is supplied by Everness