http://www.ebay.com/itm/15x-Tobacco-Pipe-Screens-Stainless-Vape-Vapor-Vapour-Bowl-Cup-6mmx12mm-1-4-x1-2-/201702712818?hash=item2ef66b25f2
Once the bowl gets a little bit of build-up in it, the screens stay in place ... in fact, when I soak the stems in iso, I keep the bowl out of it to...