The Firewood 7 with Simrell MVS as internal mouthpiece. It provides so much better cooling and taste than the standard dimpled hulu stem. I am one of those freaks who prefers titanium over glass.
With the optional fw7 waterpipe attachment, I bring you the Aezhenn made for Lamart lacewood/ebony mouthpiece with stainless steel intercooler. This is my second most regularly used setup for my fw7. I also like my Lamart long bent glass mouthpiece, as well as my Lamart bent spikey mouthpiece. I especially like to pack that mouthpiece, so I can pack the fw7 and the vapor danks up the weed on the way out. Ironically I rarely use the WPA to hook up with a waterpipe.
Storz & Bickel capsules also make for a great refill on the go. They hold a perfect amount for a bowl. Hold the FW7 upside-down. Line up the open S&B capsule to the empty bowl. Flip right-side up. The weed plops right into the bowl. Much simpler than prepacked crucibles, as well as cheaper.