This is the replacement glass chamber/mouthpiece for the Vivant DAbOX.  They are sold individually.  There are also bubbler versions of this available, however they are longer than the standard unit. Check out the links below.

In The Box:
1 Vivant DAbOX Replacement Glass Chamber/Mouthpiece

Replacement Coils, Glass Chamber/Mouthpiece, Glass Loading Tool, Silicone Filter, Glass Bubbler, and Water Filter Kits are also available.