GRAYL GRAYL One-Way Valve GeoPress

The GeoPress One-Way Drink Mix Valve significantly enhances your GeoPress and allows you to mix electrolytes or drink powder directly into purified water on the go – without compromising the filter performance. The one-way valve, which is pre-installed in all GeoPress models starting in spring 2023, utilizes a new core with optimized flow channels for clean, safe liquid intake. As mentioned in the set: The GeoPress One-Way Drink Mix Valve makes your outdoor hydration more flexible, hygienic, and suitable for everyday use. Six duckbill valves reliably prevent backflow and ensure that only filtered water enters the bottle. At the same time, the valve is easy to remove, clean, and dry – ideal for longer trips and frequent use. The BPA-free silicone material is dishwasher safe and durable, allowing you to fully focus on your activities. NOTE: The upgrade is compatible only with second-generation GeoPress cartridges. (From 2023.)