Due to fluctuating temps outside, I have my fermentor in the extra bathroom tub. Since it's such a small house, a little fermentor smell goes a long way. I played with filling the liquid trap with various liquids then had my epiphany. I made my own stink trap with a turkey baster, a cotton ball and some activated carbon. I threw it together not expecting much but it made a considerable difference. I put it on during day three of a sweet feed ferment when it was bubbling at about 6 bubbles per second. The smell that had been in that room and the hallway for days diminished in a couple hours. I don't know yet how much it will help during a rapid first day fermentation or how long the carbon will last but so far it works surprisingly well since it took me all of about 5 minutes to make. I'm pretty happy with the simple trap so I thought I'd share.