If you’re using the VLAB Halo Smart Rig, you can take your dabbing enjoyment to an entirely new level with this glycerin percolation top.  The VLAB Halo Glycerin Glass Top is designed to cool down your smoke so the hits you take are smooth and non-irritating to your throat and lungs. This glycerin-filled attachment fits the VLAB Halo and the Focus V Carta. It’s made of durable borosilicate glass and features 8 percolation holes for delivering smooth and flavorful hits. It's available in multiple colors.