My son has this totally awesome “exhaust” pipe on his bike that I covet. It’s really a resonator for the classic baseball-card-in-the-spokes trick. It makes a terrific racket, and gets people to move out of the way without necessitating a honk on your horn. I decided to build my own, using a recycled beverage bottle. Armed with a Dremel Rotary Tool, a bottle of energy drink, and a depleted gift card, I set out to make my own soda bottle bike exhaust.


Dremel Rotary Tool cut-off wheel, 180- and 280-grit abrasive buffs, aluminum oxide grinding stone, and 1/8″ drill bit
Aluminum 16oz. beverage bottle
Hose clamps (2)
Plastic gift card (depleted)
#8 screw (1) with nuts (2) and washer (1)
Pop rivet gun with 1/8″ short aluminum rivets
Permanent marker
Masking tape
Dust mask
Safety goggles

MAKE_DownloadPDF_icon.gifDownload the Project PDF
(Right click to save the PDF to your desktop.)

John Edgar Park

John Edgar Park

John Edgar Park likes to make things and tell people about it. He works at Disney Research and writes for Make and Boing Boing. He is training for American Ninja Warrior. You can find him at jpixl.net and twitter @johnedgarpark — if you like that sort of thing.

  • StefanHH

    My dear John Park,

    I do not have to read your post until the end to see who wrote it. Only up until “armed with my dremel whatsoever” and i realise: this must be by John Park or, from now on, “Dremel Guy”.
    Please do not get me all too wrong. I appreciate your projects and i also understand the need for the occasional sponsoring. But you are making it look like a Dremel tool of any kind is prerequisite to all of your projects. Add a little bit of credibility by “or any other rotary micro tool”. Now i know this is not part of your contract. But really,come on, that dremelism… John!

    This is my all-time favorite blog. Please keep it that way! ;)

    All the best,


    • John Park

      Hi Stefan, I hope it’s clear that these are sponsored projects. I absolutely agree with you that these can be done with any rotary tool, or oscillating tool in the case of the Multi-Max projects.
      That said, MAKE would never do this sort of thing using a brand or tool we didn’t believe in, and we, like most makers, use the heck out of our Dremels.
      Hope you continue enjoying our blog!

  • luke

    my card is every time breaking

    • Latka

      You are need to being having card not in spokes so far. Better English need you.