A couple of weeks ago I found a post about ways to dispense chlorine or acid out of larger containers, there was a link to a site that had a vent built into the spigot. I can not seem to find the thread again. I have searched the site again today and found this link http://utahbiodieselsupply.com/carboys.php, but they want $7 shipping for each one, the cap and the spigot and no vent. I goggled the cap and found it on Amazon here much more reasonable but again no vent. Anyone know where to get a vented spigot? I keep the Carboy in my basement and would like to fill 1 gallon at a time without any spills and least amount of fumes.