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 5 weeks. With every flush, your toilet enjoys glorious relief from stains caused by hard water, minerals and limescale. Quick and hassle free! Stain and smell protection that drops right in. That's cleaning reinvented.• Hassle-free stain protection with a Fresh Scent that drops right in your tank for a continuous clean• Easy to use – simply drop into tank and watch the water turn blue with every flush• Keeps your toilet bowl stain-free up to 5 weeks• Removes stains caused by hard water, minerals, and limescale• Fragrance infused with essential oils