Reviewed by Ping Pong A.
I recommend this product
CamelBak Type-M Mask Adapter new in package. Attaches directly to the mask its self which in turn acts as a port to plug into your CamelBak drinking nozzle to enable hydration while wearing the mask. Easy to configure and remove. Continues to seal against all elements while plugged in.
Works with protective mask models
Great for slamming Natural Lights through your Millennium gas mask!
Or staying hydrated... Or something.