Perfect Uv Pen

Steripen works like a charm with the pre-filter lid for Nalgene bottles.

Great product. We bought to use on a trip to a country where we were concerned about tap water. Fit in our toiletries bag. We used it over a 3 week vacation and it worked great. Easy to use and we felt confident that the water we drank was safe.

An Excellent Addition When Needed

This is an excellent option to pair with a filter when local water supplies demand it. I grabbed this for a trip to the Olympic Peninsula, as there were warnings about cryptosporidium in coastal water supplies. It’s a little chunky and delicate, but those trade offs are worth it for its speed and effectiveness, compared to chemicals and boiling. I imagine the rechargeable units are a bit more streamlined. Replaceable AA batteries (4) seemed like a good option for both travel and backpacking.

Reliable Uv Filter

The steripen is a classic, it works. It takes a little while to fully purify a liter, and the steripen is a bit heavier than other options, but its reliable and a great peace of mind in the back & front country.

Great Sterilizer

This is a great product to use in your filtration line up. To be clear this is best used once you have run your water through a filtration system. It helps eliminate biological contamination. I love it's form factor and how easy it is to use in my setup. I would definitely recommend Katadyn products, they seem pretty focused on trying to provide a quality line up.