Images: How to make your car run on tequila (sort of)

Two less impressive, but key bits of E-Fuel paraphernalia: on top, a package of EFuel100-branded sugar feedstock. E-Fuel executives said that the company is working with sugar distributors to make it easy for MicroFueler owners to purchase inexpensive fuel for their ethanol plants. "All fermentation processes go through sugar," Vice President Butterfield explained, saying that the production of sugar ethanol is up to six times more efficient than corn ethanol--which has gotten quite the bad rap.

Also shown: a carbon credit coupon. The price of EFuel100 feedstock is subsidized by government and corporate carbon offsets; this, according to execs, can bring the price of sugar fuel down significantly. Still, they emphasized, they don't think consumers should be concerned about rising food prices affecting the cost of sugar. Unlike wheat and rice, they insisted, sugar is in surplus.