Scrubby has just the remedy for yucky toilet stains. Introducing Scrubbing Bubbles Drop-Ins Toilet Cleaning Tablets. Just drop a tablet into your tank to help keep your toilet bowl stain-free up to 4 weeks. With every flush, your toilet enjoys glorious relief from stains caused by hard water, minerals and limescale. That's continuous stain protection for a continuous clean. Quick and hassle free. Stain and smell protection that drops right in. That's cleaning reinvented. Bowl water not harmful to children or pets. However, it is not recommended that pets regularly drink water from the toilet.