Shaped compositions for uniform delivery of a functional agent

A solid cylindrically shaped composition for use in delivering a substantially uniform concentration of a hypochlorite anti-microbial sanitizing agent to a flowing stream of water, the shaped composition comprising:

• a first layer consisting essentially of a hypochlorite salt selected from the group consisting of calcium hypochlorite, magnesium hypochlorite and mixtures thereof, the first layer being dissolvable into a flowing stream of water;
• the first layer being substantially cylindrical so as to include a top surface, a bottom surface, and a peripheral surface;
• a second layer consisting essentially of a substantially non-dissolvable material selected from the group consisting of cementitious materials, polymers, inorganic materials, fatty acids, fatty acid salts, and mixtures thereof;
• the second layer being adjacent to the bottom surface of the first layer so as to cover the bottom surface of the first layer;
• the second layer also being substantially cylindrical and having a diameter substantially equal to that of the first layer so that an exterior peripheral surface of both the first layer and adjacent second layer are substantially flush with one another;
• and
• wherein the first layer and the second layer are not effervescent.