Small Screw Top Capsules From Plastic Bottle Caps, Necks

Energy & Sustainability
Small Screw Top Capsules From Plastic Bottle Caps, Necks

Instructables user bfgreen makes small, lightweight, waterproof containers like this by sawing off plastic soda bottle necks right below the lip, flattening the cut edges on a file, applying cyanoacrylate glue, and clamping. Since these bottles are usually PET, they could also probably be solvent-welded with acetone and other common solvent cements.

Commenters on bfgreen’s post have responded with their own versions of the same idea. This small case for holding airgun pellets, above, is by Instructables user CaseyCase. Below, a micro spud-gun ignition chamber from bloke2022.

Update: Contrary to what I suggested above, experiment has proven that acetone does not effectively solvent weld PET in this application. I haven’t tried DCM or DCE yet. Heat-welding the joint does work, but its effectiveness compared to super glue is questionable.

PET bottles reused with style

12 thoughts on “Small Screw Top Capsules From Plastic Bottle Caps, Necks

  1. Brian Green says:

    Glad you liked it. You can see the original here: Plastic Soda Bottle Lid Capsule | Brian’s Backpacking Blog

    1. plastic buckets says:

      Thanks Brian! Looking for some super glue sticking process with photos. It will help me to figure out hot to cut edges and stick them together.

  2. Yuliana Yuli Rahmawati says:

    got to try this one… :D

  3. Anonymous says:

    I’ve used gallon milk jug tops  The final containers are very light weight.  Cut off one top off a jug so it still has a lip flaring outward.  Trim to fit the second lid.  It can be super glued into the second lid.  Only one lid opens, but that is fine.  Put them through the dishwasher to get rid of the glue odor.  If you make several, use puffy type paint on the lightly sanded lids so they can identified by touch (for when you are rummaging in your pack). 

  4. Anonymous says:

    A friend of mine who is a teacher was once annoyed by his students texting short messages during class, and later he bought a portable cell phone jammer, then all the students were confused that their cell phones cannot receive any signals even if it was the most advanced one.My friend said he bought it from online , and I checked some sites about that certain item. It’s so funny that I’m thinking of purchasing one as well.

  5. 123 123 says:

    Looks really great…and green )))) BTW, is there any way to make a case for cell phone jammer (here is the list of jammers ) I want to make a custom case so the device will look somehow different and thus no one understands what it really is.

Comments are closed.

Discuss this article with the rest of the community on our Discord server!

I am descended from 5,000 generations of tool-using primates. Also, I went to college and stuff. I am a long-time contributor to MAKE magazine and My work has also appeared in ReadyMade, c't – Magazin für Computertechnik, and The Wall Street Journal.

View more articles by Sean Michael Ragan


Maker Faire Bay Area 2023 - Mare Island, CA

Escape to an island of imagination + innovation as Maker Faire Bay Area returns for its 15th iteration!

Buy Tickets today! SAVE 15% and lock-in your preferred date(s).