Twin Spiral perc Beaker Base Water PipeTwin Spiral Perc Beaker Base Water Pipe UK This fantastic addition to the EDIT collection has a beaker base and a twin spiral percolator along with beautiful color accents to make it really pop. It comes complete with an 18. 8mm female ground glass jointed bowl and uses a 18. 8mm downstem to fit everything together. Twin Spiral Percolators This bong comes with dual percolators that help break up your hit. It works by filtering your smoke into smaller