Every flush saves water. Resist microbes & fungal growth. Anti-evaporation snap/airlock. Will not interfere with flush mechanics

Toilet Tank Bank™ is an easy-to-use, quick-to-install water saving device. 

Simply fill will with water and clip onto the inside of the tank wall. 

With a patented air lock and fill valve, the Tank Bank™ eliminates water evaporation and odors and will never require maintenance.

Toilet Tank Bank