Turn your Grayl GeoPress into an every day bottle

I absolutely love the Grayl Titanium GeoPress. It is a great filter, and the titanium cup allows you heat water or simple meals on a campfire or a stove.

One of the things I don't really love about it is I drink water a whole lot more than I filter water. And, it doesn't make the greatest stand alone water bottle. Until today. I did a modification to make this setup more useable every day.

I filter water on camping trips (such as kayak camping) where I can't carry all the water I need. I also will filter if I have a long outing, and want more water, or just don't want to carry a lot. But, I drink water when I wake up, when I go to the shop, take a short walk, or pretty much any time I leave the house. I want to be able to use this cool bottle for those little things.

The filter needs to be stored dry and in an air tight container to extend its life. If I leave the filter in the bottle and put clean water on top, for one, I reduce the capacity of the bottle. The bigger problem is that with moving and shaking I have seen water get past the one way valve and get the filter wet. Which means if I use it this way, I have to keep drying out the filter and worry about it being stored correctly.

Sure, I can take the filter off and store it in a zip lock bag for storage, but the bottle assembly does not work well with the filter off. The inner sleeve is held to the outer sleeve with two friction points. One at the top of the bottle, and one with the filter seal. With the filter removed, the inner sleeve is not very secure, and the inner and outer piece can bang around into each other.

Because of this, there are many times when I go to the woods with 2L of water in a bladder and the Grayl is carried empty just in case I need to filter. I do this for all the reasons I mentioned. I would prefer to be able to fill it with clean water, and only take my filter out of my pack if I needed it.

My solution in this video cutting apart an old filter and retaining a minimal amount of it, including the sealing surface. It allows me to store the filter in a ziplock bag in my pack in case I need it. The seal keeps the bottle together securely, the small size minimizes the volume used in the bottle, and I don't have to worry about getting the filter wet.

This little trick turns this system into a bottle that I can now use everyday.

While on the topic of a special adapter (hopefully from Grayl) I also share my thoughts on how this can be combined with a french press mechanism, similar to an AeroPress. This could allow you to have a french press and a "normal" water bottle conversion kit all with one piece of kit.

This is a great system as is. These are just my ideas on how to make it even better.