WaterPik WP450 Plug for charging port

If you use a portable WaterPik, chances are your charging points are corroded with regular wetting and exposure. Since WaterPik doesn't sell plugs (which they very easily can!) here's a 3D printable one that fits the WP450. I cleaned out the two holes with a small jeweller's screwdriver (the irony) otherwise the edges were too fine to print on my Printrbot.