BoulderClean Toilet Bowl Cleaner, Bergamot Rosemary & Eucalyptus

Naturally powered by plant extracts, this toilet bowl cleaner removes stubborn stains and deodorizes as it cleans. It's thick, so it clings to the surface for effective cleaning. Safe for septic tanks and waterways. Powerful clinging gel in a non-abrasive, thick formula removes dirt and grime while destroying germs, without bleach, to make your porcelain toilet bowl look shiny and new. (from BoulderClean)