Security cover for Nalgene water bottle

thingiverse

This device serves as a protective cover for Nalgene water bottles, securing the bottle cap and preventing it from accidentally opening within one's backpack if not secured properly. I recently utilized this product during my visit to Sequoia and Kings Canyon National Parks and found it to be effective in its intended purpose. However, after taking the bottle to Rocky Mountain National Park and exposing it to extreme heat within a vehicle, I discovered that the fit had become somewhat loose compared to its original state. To rectify this issue, additional material was added to prevent it from expanding excessively. The updated file, Bottletop5.scad, now incorporates these modifications. Additionally, I experimented with printing the revised version in PETG, which exhibited a slightly more flexible quality than PLA. Given PETG's higher temperature resistance, it is hoped that it will not become as soft or pliable when exposed to sunlight.