This full-sized toothbrush weighs at least one gram less than the lightest toothbrush I've ever seen (this one at ZPacks), and it cost me $0!
How, you ask?!
Simple! I made it myself from materials I already had around the house! And now, you can too!
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Alright everyone, here's how I made a carbon fiber toothbrush that weighs 6g:
Any questions? Hope this helps you drop a few grams
Required Materials and Tools:
Instructions: