Despite recent news, TSA won’t officially let you fly with medical marijuana (but it’s pretty easy to do so). That said, TSA will definitively let you fly with a “tobacco” pipe:
Thanks for your question, Jake. Pipes are allowed through the security checkpoint. Safe travels.
— AskTSA (@AskTSA) April 11, 2017
Not exactly earth-shattering or new stuff here for anyone that’s flown with a bowl. One time I was flying from Los Angeles to Binghamton, NY and I forgot I had both a bowl and a boutique bread knife I got in France (it wasn’t cheap). TSA searched my bag, removed both items, put the pipe–with resin on it–back in the bag. Some lucky TSA employee walked away with a bread knife.
As for medical marijuana and TSA..let’s just say it’s a don’t ask don’t tell situation. No one would ever fly out of Denver if they stopped every tourist with a sack.