The Pli-O-wall conveyor can transport materials/substances at high degrees of inclines, (up to 90 degrees), in “zee” configurations that eliminate the need for two or more conveyors and drives. These high-angle configurations are preferable when floor space is at a premium, or there are tight centerlines between specified destinations. The material/substance stays contained and in place with bucket-like pockets created by flexible sidewalls and risers. These are corrugated, thus enabling them to bend around pulleys and rollers.