Amazon.com: FLASHFORGE PETG Pro 1.75mm, 3D Printer Filaments 1kg (2.2lbs) Spool-Dimensional Accuracy +/- 0.02mm, Great for Printing Various Mechanical Parts, Waterproof Parts (Red, PETG Pro) : Industrial & Scientific
10 Ways to Make Your Parts Water-Resistant | Xometry Europe
How to 3D print waterproof parts - UltiMaker
Watertight 3D printing part 2: Airtight closable models - Original Prusa 3D Printers