It's polished zirconia ceramic — the same inert material used throughout the IQ3's vapor path. Zirconia doesn't absorb terpenes, doesn't off-gas at vaporization temperatures, and doesn't transfer heat to your lips the way metal mouthpieces do. After extended sessions, plastic and silicone mouthpieces accumulate residue that affects flavor; zirconia wipes clean and stays neutral. It's the only mouthpiece material that maintains DaVinci's Clean First standard from oven to mouth.

Replace it if you notice visible cracking, persistent discoloration that doesn't clean off with ISO, or any change in airflow resistance that cleaning doesn't resolve. With regular maintenance, a zirconia mouthpiece lasts a long time. Keeping a spare is standard practice for daily users who don't want a cracked mouthpiece to cut a session short.

No — the IQ3 mouthpiece is specific to the IQ3's vapor path geometry and should not be cross-used with the IQ2 or IQC. Those devices use their own mouthpiece form factors. Check the compatible accessories listed on each device's product page before ordering.

The flat mouthpiece is designed for direct use. For water tool connection on the IQ3, use the IQ3 Zirconia 10mm Water Tool Adapter — a separate accessory that replaces the mouthpiece and interfaces with any 10mm water pipe. The two serve different use cases and are not interchangeable.