Cork for 18,8mm chillum section

This cork is perfect to clean glass bongs with a 18,8mm chillum section.

Just put one cork in the 18,8mm chillum section and one cork in the kick hole.
Fill the bong cleaner into the bong and add not to hot water.
Let it soak for 5 to 10 minutes and flush the bong with water.

No more dripping and mess.