The Pink Stuff, Miracle Power Foaming Powder for Toilets, Bathroom Cleaner, 2 Pack, 7 oz. - Walmart.com
Power-Foaming Toilet Cleaner - Dr. Beckmann
Amazon.com: Don Aslett Safety Foam Toilet Bowl Cleaner (32 Oz Bottle, Pack of 2) Acidic Detergent and Deodorizer | Cleans Hard Water and Mineral Stains on Bathroom Porcelain Toilet | Quick Removal