send a jpg to tiny dino and ask them to upload it to your submission

Thanks for the kind words Sergio. Had I known that quirky did not display a pdf like it does a jpg file I would have definitely made that change. I will upload jpg files next time.

Clearly my favorite. Too bad quirky doesn't show pdf's as it does jpg's on the front page with all of the designs. That will work against this particular submission, which will get many fewer votes than it ordinarily would.

Quirky should take convert the pdf to jpg and load it up here. Either way, Rob describes a great-looking, durable, functional yogurt maker that can be made economically and will be desirable and look expensive (quality, durable materials).

I like the simplicity of this design.

One of the two containers can be much smaller. The whey can be about 30% of the original liquid. So, the smaller whey collection cup can be half or a third the size.

The yogurt side can be that much bigger. This way the yogurt making capacity can be that much greater for the same expense and material cost.

But I like that there aren't any threaded connection at the bottom of the yogurt compartment or the whey compartment.

Does yogurt making need air? If it does you might have to drill hole(s) in the container(s) near the top threaded connection to filter.

Otherwise, I like that it has fewer parts than some other designs. I like that it is made from durable stainless steel. The simple design, fewer parts allows it to be less costly and still use quality durable materials (eg SS 18/8).

This is nice but it seems a bit strange to devote HALF of the design to whey collection as opposed to Bruce's original idea where the whey is allowed to drain into a bowl or into the sink.

Would this be similar to your idea? http://www.brunton.com/product.php?id=630

Most functional and clean-looking design, except how to keep the threads clean? Twist-lock or bayonet tabs would be easier on the hygienic side.
I take it that all inner parts are made from food contact safety approved materials. No aluminum alloys, they leach in the sour medium.
The outer parts as hollow or foam-filled dual-wall stainless steel container looks solid to me.

If the whey to yogurt ratio is much less than 50/50 (never tried) I would move the filter to one side leaving the small cup just large enough to hold the whey. The cylinder looks classic and space saving, if boring. To be a bit quirky, how about pear-shaped, with the fat part of the insulation around the bottom half where the lukewarm liquid lingers?

Actually, I quite like the appearance of this one with just a few tweaks.

Make the central ring stainless steel inside, with a black rubberized coating on the outside. Then put a 45 degree bevel on the top and bottom edge of each cup.

Possibly not describing that well, but kind of like a space-age capsule. Perhaps even hexagonal cups? Or square?

Important to have the stainless inner surface so that the end product is not exposed to plastic.

As mentioned elsewhere though, you're going to want to keep this fairly short and squat to maximize heat retention. About the right dimensions in that image.

My biggest concern with the central filter, as mentioned above, is that you waste a lot of space, effectively halving the capacity of the unit.

I think I like this idea better than the single vertical concept although that had more visually appealing proportions, which is a simple fix.

But if I'm understanding the process correctly, this is more functional and streamlined. From my understanding, retaining the heat is important for the first stage and I'd replace the filter with a solid flat insulated lid.

Then I'd add the filter and the bigger container for when the yogurt was turned over and drained. Because the filter and larger lid wouldn't be exposed to heat, some color could be thrown in by making them out of plastic.

But the main reason why I this design has more potential is that after the yogurt was made, the flat lid could be used again for storage or eating out of. That's "grab and go" commuter convenience.

I'd like the container reshaped, more like the regular sized stainless mugs used for coffee.

If I wanted more yogurt, I'd get more containers and they'd be easier to store and manage than a single huge container.

Honestly, the idea kind of reminds me of a thermos. It's not very novel looking, but it seems practical.