Video: https://youtu.be/bau8SNCgk7A

You can buy a commercial version of the measuring cube, posted on this site and downloaded over 2.5 million times, dishwasher safe, food-grade material, durable injection-molded plastic:
https://www.ebay.com/str/MeasuringCube

Holder A | 11 slots | Each slot holds 1 UBS stick, or 1 SD card, or 3 (or 2) SD Micro cards | Holds a maximum 11 UBS sticks, or a bit less thick UBS sticks, or 11 SD cards, or 28 SD Micro cards, or an undefined combination of those three.

Holder B | Same as A, but with a tighter fit.

Holder C | Same as A and B, but with a tightest fit.

Mini Version | Same as above with ABC but with 7 slots.

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We printed PLA at 0.1 mm layer, 15% infill.

Supports: NONE

Enjoy

bakercube | plug saver | clamps | coins | juice squeezer | more...