A stackable plant support device includes a square open top frame and four collapsible staked legs. The water insoluble food ingredient material may include rebaudioside D and the hydrophilic polymer may include carboxymethyl cellulose. The housing is coupled to the actuator and is arranged and configured to extend at least partially into an opening in the structural element of the building. The towers are pivotable for pivoting into recesses in the base during transport. A client may select one or more providers based on a self-selection process, an optimization process, an auction process or other selection method. Component B is an organic species which can react with the hydroxy terminal groups of component A, and component C is a catalyst or mixture of catalysts.