When you've got the right product for the situation at hand, even the most overwhelming tasks become well, a lot less overwhelming. Cleaning becomes simple, rewarding and more manageable. Suddenly everything's under control. This unique toilet bowl cleaner gradually dissolves with each flush, allowing a controlled release of cleaning solution and fragrance. Each disc lasts up to 7-days, for a 24/7 continuous clean. And it leaves no residue behind. Your toilet bowl will remain cleaner, longer with practically zero effort on your part. Color: Clear.