You can dig this into the sand to hide things in or just keep them out of the way while you are at the beach.  The interior space is about 90mm in diameter and 150mm deep, suitable for phones, wallets, glasses, keys, etc.

This version is narrower so that it is easier to travel with and shorter so it can be printed on a MK3 / MK4.  It also has a 45 degree thread profile so the threads print without supports.

Instructions

With the lid off, grab the handle in the botttom and twist it into the sand until it is level with the surface.  Then put whatever you want inside and screw the lid on.  Note:  depending on your print settings and how long it is in the ground, it may not be waterproof, so you may want to put things that are sensitive to water in a plastic zip bag first.

Printing

• Material: PETG
• Nozzle: any (the sample is sliced for 0.6)
• Layer height preset: 0.32 structural (use the largest structural thickness for other nozzle sizes)
• Perimeters: 4
• Infill: 20%
• Supports: None
  • You will get a warning about long bridge extrusions from the inside handle, but it should be fine.  If your bridging is not very good, you may want to turn on organic supports.

The slicer_beach_vault.3mf is a a PrusaSlicer project with the settings above.

Post-processing / Assembly

• None