Automatically clean, freshen and deodorize your toilet with Ty-D-Bol Lavender In-Tank Tablets. Drop the purple tablets in your toilet tank to activate powerful detergents that automatically provide a continuous. Clean You Can See with every flush. Our ‘Purple Formula’ works to fight and prevent hard water stains and make sure your toilet keeps a tidy bowl without harming your plumbing or toilet tank. Keep your toilet stain-free and your bathroom smelling oh-so-fresh with ty-d-bol Continuous Purple Toilet Tablets.