• Let's design a cover first

    karl St-Arnaud02/11/2023 at 22:03 0 comments

    To overcome the leak issue, I decided to use a replacement rubber gasket of hydro flask in my design. To test how much water tight my design was, I decided to start my designing a cover instead of going directly for the adapter.

    hydro flask cover

    Improve thread

    I received a caliper as a gift that help me take more precise measurement of the hydro flask thread. This created a much more water tight interface.

    Leak through the plastic

    The first iteration I did had leak through the plastic itself. Here are some modification I brought to my design and printing process to get a water tight print

    • Rounded edge inside the cover
    • 3D print at higher temperature (210 C)
    • Increase the number of layer on top, bottom and the wall.


    In the end, the final cover was tested with for 1h with the bottle tilted and couldn't find any leak of water.

    I provided in the files section, the stl file of the hydro flask cover.

  • First design

    karl St-Arnaud02/11/2023 at 21:44 0 comments

    I worked on my first design from January 2022 to March 2022, learning FreeCad from this amazing channel and applying what I learned to my first design. 

    I did a few iterations that are shown in the picture below to find:

    1. Thread compatible with the hydro-flask (I did a few iterations to get a working thread)
    2. Design that fits inside the soda stream
      • The first iteration couldn't fit because the top part wasn't long enough
    3. Thread compatible with the soda stream
      • The soda stream I have doesn't use the thread. It uses the larger
        base layer (yellow arrow) to attach to the soda stream bottle and form a sealed link. In the mean time, I improved the visual look of the design.

    In the end, I was able to design a working adapter. However, I realized quickly that the interface between the adapter and the hydro-flask needed to be fully sealed to avoid any spill.

    From this point, the project was toss away until December 2022 to focus on other projects.