Scrubbing Bubbles Drop-Ins are just the remedy for yucky toilet stains 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 Hassle-free stain and smell protection that drops right in your tank for a continuous clean Bowl water not harmful to children or pets, however, it is not recommended that pets regularly drink water from toilet