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An espresso cup specially designed with fins, to ensure the successful deployment of your rocket fuel. All systems are go! Paraboloid bowl holds approximately 1.5 fl oz. or 45 mL. (Note that I previously claimed the cup held 60 mL. While my 3D modelling software still reports that as the internal volume, some combination of the printing process and glazing is robbing me of internal volume. Contact me if you'd be interested in a larger, more expensive 60 mL cup.)
After receiving feedback from Shapeways, I've created a slightly revised model for the cup. I'm told that this model will be easier to print and glaze, leading to a more reliable product. The changes are minor -- it's a little wider, a little heavier, and has more rounding on edges that were previously sharp (a 3D rendering shows the differences above).
Update (April 13th, 2013): The cup has had a great run on Shapeways, and I deeply appreciate the attention and positive feedback it has received. The bad news is that I've got to stop offering it for sale here. The good news is that the cup is now available commercially! It's being manufactured by Fred and Friends, sold under the name "Blast Off! Espresso Cup Set". It's already available for purchase online (perpetualkid.com, thinkgeek.com), and I'm sure you'll be able to find it in your favourite housewares store soon.
Teeny Keanu ($25)
Little Keanu ($45)
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Everyone's wearing their Nano on their wrist nowadays, now you can wear it on a one part 3D printed nano bracelet.
The NANOLET simply wraps around your wrist and fits snugly up to your hand which is perfect for running and everyday use. An alternative to the plethora of nano watches that are around now.
Suitable for Small sized wrists. Available in a range of colors
Small is for a wrist of circumference 145mm - 165mm. The best way to measure your wrist is to wrap a piece of string around your wrist, mark it and then measure it. More sizes coming soon.
Click here for all sizes
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A smaller version of Triple Gear is available here. A baseplate and axle for using a motor to move the triple gear is available here. Also see 15 cm axle for Triple gear and 30 cm axle for Triple gear.
In this unusual mechanism three gears mesh together in pairs, and yet they can turn!

If you take three ordinary gears and put them together so that each gear meshes with the other two, then none of the gears can turn because neighbouring gears must turn in opposite directions. Triple gear avoids this problem by having the three "gears" arranged like linked rings - the gears then rotate along skew axes, and the opposite direction rule no longer applies (although see also Oskar van Deventer's Magic Gears for another possible solution).
This is joint work with Saul Schleimer. We were inspired by another of Oskar's designs, his Knotted Gear, which consists of two linked rings that gear with each other, and of course we wondered if it would be possible to do three linked rings!
Here is a paper on the mathematics behind the Triple gear, and how we designed it.
A note on materials: I have so far printed it in White Strong & Flexible only. It may arrive with the rings slightly fused together, but gently moving them back and forth will loosen them up, and the mechanism gets smoother with use. I'm not sure what effect the polishing process would have on the gearing mechanism, since it would polish the exposed gear teeth but not those which are meshed as it comes out of the printer. So I have disabled the polished material options. If you really want to try it, let me know. I also haven't tested any of the "frosted detail" materials, but I imagine that they should work fine. It isn't printable in the other "detail" materials because of cleaning problems.