Stirling Engine Coffee Mug Lid

Description:

Coffee still too hot to drink? Place this beautiful little engine on top of your cup and watch it go!?

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This fully functional Stirling engine model operates solely from the power provided by the heat (or cold)?of the surface on which it is placed. ?The model is designed with coffee cups in mind; place it on top of the rim when the mug is full of piping-hot liquid and the heat from the steam given off by the liquid will power the engine, causing the wheel to move faster or slower depending on the temperature of the steam.

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Main Features:

• As long as the difference in temperature is enough, it won't stop going
• Great to look at, even when not in action
• Safe for kids (think science project!)
• Wheel spins slower or faster depending on heat temperature
• Works with coffee mugs filled with hot liquid, hot plates, or suspended over a candle flame
• Lasts up to 30-40 minutes when using boiling water

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Specifications:

¡Á Size Chart

For size accuracy, please refer to the actual measurement.

Bust
Stand up straight and use a measuring tape to circle around the fullest part of your chest

Waist
Use a measuring tape to circle your waist (like a belt) at your natural waistline, which is located 2cm above your belly button

Hips
Put your feet together and use a measuring tape to circle around the widest part of your hips

Upper arm
Lift your arm so that your upper arm is in a horizontal position and circle around the thickest part of your upper arm with a measuring tape

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