Watch this Down Stem In line Diffuser Pyramid Bong/Dab Rig in action:
This is one of our favorites!
The design is quite straightforward, a down stemin line diffuser on the bottom to generate bubbles like crazy, you can convert this piece into a dab rig EASILY! Since this piece doesn't feature any percolators in it you don't need to worry about the essence of your concentrates being wasted. It comes with a 14mm female bowl for flowers.