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We’ve begun some experimenting with PLA 3D printed parts to determine how they’re affected by exposure to water and ice, and to see if we can use a coating to make them waterproof.

Erin has designed an STL of a nalgene lid, and Beck has printed it. For the first round of testing, we’ll do the following experiments:

  • Placing a part in water for a set amount of time
  • Placing a part in water, freezing it, thawing it, and repeating it.

Next we’ll try the same experiments, but we’ll treat the part with sealant first.

In this first round of testing, we used a plastic tupperware container to freeze the part.

Surprisingly, it survived fairly well, even without any surface treatment! One small crack occurred on the inside of the cap.

Frozen lid!

Small break around center piece,

Just a small break!