[wlesieutre]

Make a cut through it shaped like a mobius strip - that is, a single 180 degree rotation instead of going the whole 360 degrees shown here.

To think about it another way, imagine if you took a mobius strip and constructed a semicircular lump of bread on the surface, extending it around until it connects back to itself. You've made a bagel!

Now take the mobius strip out of the middle, and the gap it leaves is the cut you're asking to make.

[jnordwick]

Sounds like a job for some parchment and my weekend.

I wonder if I could sell bagel-sized silicone mobius strips for baking.

[wlesieutre]

Potentially interesting to anyone with an oven, if you can capture 1% of that market you'll be rich!

I'd suggest raising a few million in seed funding and renting an office in downtown SF. If it doesn't pan out you can pivot into math-related silicone ice cube trays.

[jnordwick]

The ICO is Monday. First 10,000 have an ERC20 address printed on the mold.