yo, im making a new bowl to complete my new lung pipe but im using a huge bowl and it doesnt seem completely air tight where the bowl goes through the cap. I was wondering wats safe and easy to use to seal my bowl onto my cap? I was thinking just glue but I thought there might be health issues with that I also dont want to use tape because thats kind of ghetto and not very good also it would be hard to get the tape on. any ideas on a safe way to airtight my bowl to my cap? Thnx