Add a 5v blower, a power source, and a few screws to this gadget, and you'll have a way to quickly dry out the bladder from a hydration pack (like a CamelBak) for storage. If you've ever left water in one, even a little bit, for more than a week or so, you already know what a chore it is to clean it up before using it again. This design grew out of the frustration I had trying to position the blower with clothes pins or chip-clips and hold the hydration-bladder open to get it dry. It was also motivated by a desire to not have the hydration-bladder hanging in an inconvenient place for several days just to be sure it was completely dry.

Note: The middle section of the "chimney" tube (the one that looks like a stepped box) can be printed multiple times for longer/taller bladders. Two of them, stacked, is probably enough for most "full size"/100-oz/3-liter bladders.

• The blower I used is this one: [http://a.co/4T6JGO4](http://a.co/4T6JGO4)
• The USB power cord I used is here: [http://a.co/2O2biIq](http://a.co/2O2biIq)
• And the power jack is this one: [http://a.co/f8NtBDH](http://a.co/f8NtBDH)
• The machine screws, nuts and washers to mount the blower shouldn't be too hard to find at a local hardware store. The ones I used were just ones I had as extras from previous projects so I don't have any specific source or part number for them.

If you want the OpenSCAD source files, you can clone this Github repo: [https://github.com/rthomas67/hydrationbladderdryer](https://github.com/rthomas67/hydrationbladderdryer)