GRAYL GRAYL One-Way Valve UltraPress

The UltraPress One-Way Drink Mix Valve expands your UltraPress with a practical function that allows you to safely mix electrolytes and drink powder into freshly filtered water on the go – without compromising the filter performance. The valve is now pre-assembled in every UltraPress and offers you maximum flexibility for sports activities, hikes, or travel. As mentioned in the text: The UltraPress One-Way Drink Mix Valve uses four duckbill valves that reliably prevent backflow and thus protect the cartridge. At the same time, operation remains straightforward: The valve can be easily removed, cleaned, and dried, allowing you to maintain it hygienically even with frequent use. The food-safe, BPA-free silicone is dishwasher safe and therefore ideal for regular use. The valve is compatible with all UltraPress and UltraLight cartridges – perfect if you want to customize your hydration.