Did you know the average bong or pipe has about 50% MORE bacteria than a public toilet seat? Using a MouthPeace bong filter has been scientifically proven to reduce the spread of germs when smoking with others. Includes: 1x Moose Labs Lanyard 1x Moose Labs Mouthpeace 3x Moose Labs Activated Carbon Filters Activated carbon's antibacterial properties absorb resins, contaminants, & tar. Triple layer filters do not reduce airflow. Replace as needed for optimal performance. Prevents germs BPA free Universal fit Doctor recommended Dishwasher safe platinum cured medical grade silicone silicone mouthpiece filter for bongs.