Watertight Jar Underwater Use (With O-Ring Seal)

This waterproof jar is designed to be submersible and keep your contents dry even underwater.
It features a groove for a standard O-ring gasket to ensure a tight, leak-proof seal.

🛠️ You can 3D print the gasket using flexible filament (like TPU), but I recommend buying a standard rubber O-ring for best results.
It uses a 115 × 5 mm O-ring, easy to find and inexpensive.

To be truly waterproof, the jar must be printed with 100% infill. PETG or ASA are recommended for better sealing and durability.

Great for:

• storing small objects during outdoor activities
• underwater experiments
• keeping electronics or matches dry

Print the parts, insert the O-ring, screw the lid tight—and you're good to dive!

⚠️ Immerse at your own risk. Always perform waterproof tests before real use. I take no responsibility for any damage or loss resulting from use of this design.