Screw cap to match a carabiner
thingiverse
Every time I hit the trails, I meticulously fasten a 1-liter water bottle to my harness but the risk of losing it keeps me up at night. So, I redesigned the standard bottle cap: http://www.thingiverse.com/thing:35907 to securely attach the bottle to my climbing gear.
Download Model from thingiverse
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