Hey! This thing is still a Work in Progress. Files, instructions, and other stuff might change!

Stocking test tube Waterproof Survivalist

by WaveSkyLord Sep 18, 2016
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Can you open up the design so inner diameter is at least 30mm?

If you don't want to print the tubes , consider using old prescription bottles. They can be made water tight, come in all sizes and are free to cheap.