If water gets hard to come by, you'll be glad you had that artificial bladder installed. Japanese design-engineering firm Takram has a whole line of organs that make more efficient use of precious resources. But before you schedule an appointment with your organ-retrofitting specialist, keep in mind that this bladder is a concept originally designed as a work of art, not a working prototype. Then again, duct tape is supposedly only for ducts. In any case, always remember to sip, not gulp.