I use the Sea-to-Summit 10L water bladder on my trips. I have two of them.

I also use the Platypus Gravity filter.

After the second year of just shoving the output of the filter down the throat of the S2S, I decided to design a coupler and print it on my 3D printer.

Here it is!!

I like that! Other combinations would also be helpful. Simple caps with tubing connections could be useful.
I just glued together a cap for a Nalgene collapsible bottle, 3D printed would be cleaner and stronger.


butthead

Trying to understand which part you made. Did you glue the nipple on to a nalgene cap?

TechnoScout: "Trying to understand which part you made. Did you glue the nipple on to a nalgene cap?"

If you added a nipple to a stock cap, I think that is a better solution than printing a cap on a 3D printer.

Just put up as an example. It's a nipple glued into a hole drilled thru the cap. It works, just not a visually appealing mod. I was thinking along the lines of bulkhead nipple ports to add simmilar to store bought but with a wider sealing flange. Just dustin' cobwebs outa the brain-box.

butthead