Open-when letter capsule — 3D-printable model preview

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Collections & display Multi-part assembly

Open-when letter capsule

Send someone letters to open at the right moment

A slim screw-top capsule for one rolled-up letter, with "OPEN WHEN" running up the side. Print a set for someone going away: open when you're homesick, when it's your birthday, when you need a laugh. Write the rest on the lid.

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Size: Ø 34 mm, 140 mm tall
Shape: Round
Walls: 1.6 mm
Volume: 27.2 cm³
Est. weight (PLA): 33.7 g
Parts to print: 3
Category: Collections & display
Made by: Krypto
Built in: 9 steps

What’s in it

Round, Ø 34 mm, 140 mm tall, with 1.6 mm walls
Raised text: “OPEN WHEN”
Screw-on lid (prints separately)

How to print it

Fits an A5 sheet rolled tightly. Print each capsule in a different colour.

Prints as shown on its floor, no supports. The threaded lid and its neck piece print separately; adjust Fit in the Lid tab if it binds.

Filament: at most about 33.7 g of PLA printed solid (roughly $0.67 at $20 per kg); normal infill uses less.

To get the files, open it in the generator and choose File › Download STL (one file per part) or Download 3MF (a 3MF per part, plus a Bambu Studio / Orca Slicer project with every part on its own plate).

Questions

What size is the open-when letter capsule model?

The open-when letter capsule model measures Ø 34 mm, 140 mm tall. You can change every size in the free SO3D.xyz generator before you download it.

Does it need supports?

No. Fits an A5 sheet rolled tightly. Print each capsule in a different colour. Prints as shown on its floor, no supports. The threaded lid and its neck piece print separately; adjust Fit in the Lid tab if it binds.

How much filament does it use?

At most about 33.7 g of PLA (27.2 cm³ printed solid), roughly $0.67 of filament at $20 per kg. Normal infill uses less.

How many parts does it print as?

3 parts. The download lays each part flat in its best print position: Download STL gives one file per part, Download 3MF gives a 3MF per part plus a Bambu Studio / Orca Slicer project with each part on its own plate.

Can I change it?

Yes. Open it in the SO3D.xyz generator (free, in your browser), change the size, walls, dividers, holes, text or anything else, then download it as STL or 3MF for your slicer.

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Make it fit your space

Change the size, walls, dividers, holes and labels of the open-when letter capsule model in your browser, then download it for your printer. Free, no CAD needed.

Customize this model