title_body: Safety concern regarding aluminum foil inside a moka pot
upvoted_answer: With the moka pot being made of aluminum itself, there isn't really any health effects from using foil. If there is a worry about ingesting tiny flakes of aluminum, you'd a worse time eating that leftover lasagna.
  The only caveat is if you use too much and it wedges the funnel into the basin and you can't remove it. As a side note, with the pot being much thicker than the funnel, it would also be pretty much impossible to crack it doing this.
  If you have followed his advice and made sure the gasket is in good shape and not indented too much. The lip around the funnel could be out of shape, and like he showed sits deeper than what the gasket can seal.