I have one of these for the the last few years. I put it into use in 2007, anyways, they work fine, I don't age in the tank, just primary. They aren't airtight, don't need an airlock, and are what they are. I use mine all the time, 7 days, and outta there. Winters are better, but in the fruit fly season, its a quick trip then keg and drink.