Why don't they just use an empty 40 ouncer?

TVNZ: Pimp up your ride with a loo

If you're stuck in traffic when Mother Nature calls, Japan's Kaneko Sangyo Co. has developed the loo for you.

The manufacturer of plastic car accessories has drawn back the curtain on its new portable toilet for cars.

The toilet comes with a curtain large enough to conceal users and a plastic bag to collect waste.

"The commode will come in handy during major disasters such as earthquakes or when you are caught in a traffic jam," a company official told reporters.