AutoStir Mug – Hand-Cranked Self-Stirring Coffee Mug, No Batteries

This 3D-printed self-stirring coffee mug uses a gear-driven mechanism powered by a hand crank — no batteries required! Simply turn the side-mounted handle and the internal paddle mixes your drink evenly. 
The airtight lid features a TPU gasket for a splash-proof seal, making this mug ideal for coffee, hot chocolate or protein shakes — whether at your desk, in the car or outdoors. 

🔹 Features:

Hand-crank gear mechanism for stirring: fun, functional & mechanical

Airtight lid with flexible TPU gasket to prevent splashes and spills

Ergonomic design built for everyday use — no batteries or cables

Designed for printing with materials like PETG or ABS for high heat resistance. 

🔹 Recommended print settings:

Material: PETG or ABS (for heat resistance & durability) 

Layer height: 0.2 mm

Infill: 30-40%

Supports: Required for lid only (gear and handle ideally printed flat)

Orientation: Print the mug upright and the gear parts flat for best strength and alignment. 

🔹 Use cases:

Coffee lovers who want a fun and functional mug

Office workers, students, travelers — a mug that stirs itself

Gift for gadget fans, engineers or mechanical design lovers

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