Zep Acidic Toilet Bowl Cleaner - 1 Gallon (Case of 4) R43710 - 2x Thicker Than Before! Professional Strength, Thick Gel Clings to Dirt and Leaves Toilets Clean - Walmart.com
Noble Chemical 1 qt. / 32 oz. Valient Ready-to-Use Disinfectant Toilet Bowl Cleaner - 12/Case