Platypus DayCap In-Bottle Filter

The Platypus Daycap is a versatile accessory! It serves both as a cap and as a water filtration system. It transforms your flask or wide-mouth bottle into a quick, easy-to-use, health-saving water filter.

This cap is compatible with Yeti Yonder, Nalgene Wide Mouth and Hydro Flask Wide Mouth bottles. It features a 0.2-micron hollow-fiber filtration membrane. This technology guarantees safe, reliable hydration in the great outdoors. This water treatment device eliminates 99.9999% of bacteria and 99.9% of protozoa, including giardia, cryptospridium, E. coli, salmonella and cholera, in compliance with NSF standard P231.