It is made of glass that was handmade during the blowing process with a thread. It includes 1.4301 (V2A) stainless steel thread with WOOKAH engraving. The distinctness of the Smooth vase derives from the fact that its cover is completely smooth, clearly transparent, and lacks cuts. As a rare occurrence, the material can include a subtle feature: a thread-like streak within the vase.
It is compatible only with WOOKAH THREAD&GROMMETS model.
Note: It does not match the new edition of WOOKAH with quick-lock system.