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The Pringles Protector: 4-Ring Snack Cryptex

Secure your snacks! A customizable 4-ring combination lock. Features interchangeable letter and number rings.
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updated February 6, 2026

Description

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Protect your stack from "unauthorized snacking" with the Pringles Protector. This functional cryptex-style lock fits precisely over a standard Pringles tube. Using a mechanical stop, the bottom sleeve traps the can's top lip, making it impossible to open without the correct code.

Engineering Features

  • Flex-Fit Core: The inner sleeve features a strategic split on the backside. This allows the material to flex just enough to pass over the bottom rolled lip of the can while maintaining a secure friction fit once in place.

  • Customizable Code: Unlike fixed locks, you can change your combination anytime by re-orienting the rings.

  • Alphabetical Flexibility: I’ve included three distinct letter rings. To spell your desired 4-letter word, simply print the four rings that contain your required letters.

    • Ring 1: Letters A through J

    • Ring 2: Letters K through T

    • Ring 3: Letters U, Z, and common vowels (A, E, I, O) to maximize word possibilities.

  • Optional Topper: Includes a version with a custom logo and a plain version for a sleeker look.

Assembly & Usage

  1. Print Your Rings: Choose between numbers or the three letter-ring variations. Ensure you print four rings total to match your chosen word or number.

  2. Install the Base: Slide the inner lock core over the bottom of your Pringles can. The split in the back will flex to bypass the rim. Slide it all the way to the top.

  3. Assemble the Lock: Slide four inner locking rings onto the locking core. The walls will flex enough to get them on. Rotate them so that the gates are all aligned with the gap.

  4. Set the Code: Slide your chosen rings onto the core. Align your secret code with the inner ring gates and the indicator marks on the base. Press fit the retainer ring to hold it all in place (if you never want to change your code again, you can glue the retainer ring on).

  5. Lock: Slide the lid on and scramble the rings. Your chips are now secure from unauthorized snacking!

Recommended Print Settings

  • Nozzle: 0.4mm

  • Layer Height: 0.2mm

  • Supports: None.

  • Infill: 15%

  • Walls: external walls first for added accuracy.

Related Models

Improve your Pringles enjoyment with this attachment

This Valentine's Crytex container has different letter rings that are compatible with this model.

Here's another Cryptex container I designed:

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Model origin

The author marked this model as their own original creation.

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