Hydrapak UltraFlask+ Filter Cap

Having a filter that's ready to plug and play between all your flasks can be a real lifesaver, or - you know, just extremely convenient! The filter comes with a connected bite-valve top, meaning that your water refueling stations can look like idyllic meadow streams, high-alpine creeks, and river inlets. You might want to run the Oregon Trail, we just don't want you to catch dysentery. So, at your nearest river crossing, simply remove the cap and filter, dunk the bottle, replace cap and filter, and enjoy the most efficient wild-water refuel in your life.

• Removes 99.99% of common waterborne bacteria, such as E.coli and parasitic cysts.
• Lightweight, simple, extremely packable.
• Compatible with 42mm softflasks.